BJOG - 2022 - Girling - Green Top Guideline No 43 June 2022
BJOG - 2022 - Girling - Green Top Guideline No 43 June 2022
BJOG - 2022 - Girling - Green Top Guideline No 43 June 2022
DOI: 10.1111/1471-0528.17206
R C O G G R E E N -T O P G U I D E L I N E S
Joanna Girling | Caroline L. Knight | Lucy Chappell | on behalf of the Royal College of
Obstetricians and Gynaecologists
Correspondence
Royal College of Obstetricians and Key recommendations
Gynaecologists, 10–18 Union Street, London
SE1 1SZ, UK.
• The diagnosis of intrahepatic cholestasis of pregnancy (ICP) should be considered
Email: clinicaleffectiveness@rcog.org.uk in pregnant women who have itching in skin of normal appearance and raised
peak random total bile acid concentration of 19 micromol/L or more. [Grade D]
This is the third edition of the guideline.
The first edition was published in 2006 and • Additional laboratory and/or imaging investigations are not recommended
the second in 2011 under the title Obstetric
Cholestasis.
unless itch is associated with atypical clinical symptoms, the presence of relevant
comorbidities, or in early onset severe ICP. Consider additional postnatal
investigations in women in whom resolution of abnormal liver function tests is
delayed or does not occur. [Grade C]
• Consider discussing the care of women with severe, very early or atypical presentation
of what appears to be ICP with a hepatologist. [Grade D]
• Confirm the diagnosis of ICP in the postnatal period at least 4 weeks after birth,
with resolution of itching and liver function tests returning to normal (including
bile acids). [Grade D]
• Advise women with isolated ICP and a singleton pregnancy that the risk of
stillbirth only increases above population rate once their serum bile acid
concentration is 100 micromol/L or more.
⚬ In women with peak bile acids 19–39 micromol/L (mild ICP) and no other risk
factors, advise them that the risk of stillbirth is similar to the background risk.
Consider options of planned birth by 40 weeks' gestation or ongoing antenatal
care according to national guidance.
⚬ In women with peak bile acids 40–99 micromol/L (moderate ICP) and no other
risk factors, advise them that the known risk of stillbirth is similar to the
background risk until 38– 39 weeks' gestation. Consider planned birth at
38–39 weeks' gestation.
⚬ In women with peak bile acids 100 micromol/L or more (severe ICP), advise them
that the risk of stillbirth is higher than the background risk. Consider planned
birth at 35–36 weeks' gestation. [Grade A]
• Advise women with ICP and a twin pregnancy that the risk of stillbirth is higher
compared with a twin pregnancy without ICP. [Grade D]
• Clinicians should be aware that fetal ultrasound and/or cardiotocography (CTG)
do not predict or prevent stillbirth in ICP. [Grade D]
• Advise women with ICP that the presence of risk factors or co-morbidities (such as
gestational diabetes and/or pre-eclampsia and/or multifetal pregnancy) appear to
increase the risk of stillbirth and may influence decision-making around timing of
planned birth. [Grade D]
• Advise women that there are no treatments that improve pregnancy outcome (or
raised bile acid concentrations) and treatments to improve maternal itching are of
limited benefit. [Grade A]
• Do not routinely offer ursodeoxycholic acid for the purpose of reducing adverse
perinatal outcomes in women with ICP. [Grade A]
1 | PU R POSE A N D SC OPE possible for other conditions to co-exist. Pruritus and raised
bile acid concentrations should return to normal after birth.
This guideline summarises the evidence regarding the di- Ideally, all women with ICP should have liver function
agnosis, and the maternal and fetal risks of intrahepatic tests (including bile acids) checked after birth, as a propor-
cholestasis of pregnancy (ICP), previously called obstetric tion may have persistent abnormalities suggestive of addi-
cholestasis. It provides guidance regarding the different care tional or alternative comorbidities (such as non-a lcoholic
options available. These should be considered in conjunc- fatty liver). Few studies have reported comprehensive post-
tion with the wishes of the woman, as part of shared and natal follow-up of women to assess for additional diagnoses.
informed decision-making. There are no clinical features or laboratory patterns that
While some high quality randomised controlled trials are unique to ICP, as other conditions can cause itching, or
in ICP have now been completed, many publications do not raised bile acid concentrations in pregnancy. Around 25% of
have such a rigorous design, and this limits the ability to pro- pregnant women develop itching2,5; the majority of these do
vide detailed evidence-based recommendations for specific not have and do not develop ICP.
aspects of care. Areas of uncertainty are highlighted along Historically, ICP has been diagnosed in women on the
with recommendations for future research in this field. basis of self-reported itching together with elevation of any
Within this document we use the terms pregnant woman of a wide range of liver function tests beyond pregnancy-
and women's health. However, it is important to acknowl- specific limits.6 There is now increasing evidence that in
edge that it is not only people who identify as women for singleton pregnancies, most liver function tests do not re-
whom it is necessary to access care. Obstetric and gynaecol- flect risk of fetal demise and that only maternal total bile
ogy services and delivery of care must therefore be appropri- acid concentrations results are associated with the risk of
ate, inclusive and sensitive to the needs of those individuals stillbirth.
whose gender identity does not align with the sex they were A meta- analysis of 23 studies involving 5557 women
assigned at birth. with ICP and 165 136 healthy controls, and the first indi-
vidual patient data analysis of 5269 women with ICP from
27 studies7 has been published since this guideline was last
2 | I N T RODUC T ION updated. In singleton pregnancies, stillbirth was associated
with maximum total bile acid concentration, especially over
The care of women and pregnant people with ICP is driven 100 micromol/L. In pregnancies with co-morbidities that
by concern from women and from healthcare professionals themselves may impact on pregnancy outcome (such as mul-
over the potential increased risk of stillbirth. Reduction of tifetal, diabetic, pre-eclamptic pregnancies), these must be
stillbirth is a priority in maternity care in the UK.1 taken into account when considering risks and care options.
Prevalence is influenced by genetic and environmental Bile acid concentrations are not associated with intensity
aspects and varies between populations. In the UK, ICP af- of itching.8 Other liver blood tests, such as alanine trans-
fects 0.7% of pregnancies in multi-ethnic populations, and aminase or aspartate transaminase are not associated with
1.2%–1.5% of women of Indian-Asian or Pakistani-Asian pregnancy outcome.7 In light of this, the consensus is now
origin.2,3 that the diagnosis of ICP requires elevated maternal bile
Intrahepatic cholestasis of pregnancy is a multifactorial acid concentrations, and that women and pregnant people
condition. It is characterised by pruritus in the absence of with itching and isolated raised transaminases alone (with
a primary skin condition, with abnormal maternal bile normal bile acid concentrations) should not be given a di-
acid concentrations. The onset of symptoms is most com- agnosis of ICP.9 This is supported by the recent systematic
mon in the third trimester, but can be earlier in pregnancy.4 review described above, in which there was no association
Alternative diagnoses (such as pre-eclampsia) should always between abnormal maternal transaminase concentrations
be considered before a diagnosis of ICP is made; it is also and stillbirth.7
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INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e97
2 .1 | What terminology should be used to cholestasis’, ‘bile acids and salts’ and ‘liver function
describe the conditions? test’. The search was restricted to articles published until
August 2017. The full search strategy is available to view
Most published studies to date have included women with ICP online as supporting information. A further search was
diagnosed on the basis of itch and elevated bile acids above the undertaken up to February 2021 and additional arti-
laboratory reference range. In a study of 560 women a preg- cles included as appropriate. The full literature search
nancy specific reference range for non-fasting bile acids was is available to view online as supporting information
calculated with an upper limit of normal of 18 micromol/L.10 (Appendices S1 and S2).
In light of the meta- analysis and individual patient data This Royal College of Obstetricians and Gyneacologists
analysis showing that stillbirth risk is not linked with alanine (RCOG) guideline was developed in accordance with the
transaminase levels, but is linked with peak bile acid concen- standard methodology for producing RCOG Green- top
tration,7 the suggested terminology for pregnant women with Guidelines.11
otherwise unexplained itching is outlined in Table 1.
If the itchy skin looks normal, or there is only skin there should be greater caution if bile acid concentrations
trauma due to scratching, the diagnosis may include ges- have been markedly raised (e.g. 100 micromol/L or more).
tational pruritus, or ICP (see Table 1); measurement of [Evidence level 4]
bile acid concentrations and liver function tests should be
undertaken. Raised bile acid concentration of 19 micro-
mol/L or more in pregnancy supports a diagnosis of ICP. 4 . 2 | What is the role of other investigations
[Evidence level 4] in the care of women with suspected ICP?
When clinically indicated, bile acid measurements should
be taken at a convenient time, and do not need to be per- Evidence Rationale for the
formed fasting. By taking a non-fasting upper limit of nor- Recommendation quality Strength recommendation
mal up to 19 micromol/L for bile acid concentrations, almost
Additional laboratory 2+ C A cohort study
20% of women previously considered to have ICP (as their and/or imaging showed that
bile acid concentrations are below 19 micromol/L but above investigations are the likelihood
the standard laboratory cut off) do not have this diagnosis. not recommended that routine
Published data indicate that pregnant women with raised in every woman, but investigations
could be considered would identify
bile acids less than 19 micromol/L are not at increased risk
on an individual other causes of the
of stillbirth.10 In addition, as prandial readings are higher basis. Consider clinical picture was
than fasting, this approach maximises the chance of detect- antenatal testing only extremely low
ing peak bile acid readings that are of greater clinical impor- if there are atypical
tance for preventing adverse pregnancy outcome. clinical symptoms,
presence of relevant
Itching of normal skin, liver dysfunction and elevated bile
comorbidities,
acid concentrations are non-specific and have a wide range or early onset
of causes. A healthcare professional should carry out a struc- severe ICP.
tured history and examination, and consider other potential Consider postnatal
diagnoses: these may be pregnancy specific (including pre- investigations in
women in whom
eclampsia) or coincidental to the pregnancy (comprehen-
resolution of
sively reviewed by Walker et al).12 Drug reactions, allergic abnormal liver
reactions, and urticaria should form part of the differential function tests is
diagnosis. [Evidence level 4] delayed or does not
In women and pregnant people with persistent itch of occur
normal skin and normal blood results, an initial diagnosis of
gestational pruritus should be considered. Women can go on
to develop ICP up to 15 weeks after a diagnosis of gestational Previous RCOG guidelines14 have recommended rou-
pruritus.13 If itching continues for these women, they should tine laboratory and imaging investigations to exclude
be offered review with repeated liver function tests and bile other causes for the clinical picture of ICP, including
acid measurement as clinically indicated. The frequency and viral and autoimmune tests and liver ultrasound. A re-
duration of review and tests should be determined on an in- cent retrospective review of over 500 pregnant women
dividual basis, but might be based around scheduled care. The with raised bile acid concentrations suggests that the
gestational age is also relevant in determining test frequency, likelihood of identifying a viral, autoimmune, or struc-
particularly later in the third trimester when a diagnosis of ICP tural cause for the itching and liver derangement that
may change care around the timing of birth (aiming to reduce was not suspected on other clinical grounds is extremely
the risk of stillbirth) [see Section 5.2]. Use pregnancy-specific low as no new diagnoses were made following investi-
reference ranges for liver function tests.6 [Evidence level 4] gations.15 Therefore, routine use of other investigations
Pruritus and biochemical abnormalities usually persist is no longer recommended. The UK National Screening
throughout pregnancy in women with ICP, although it Committee does not recommend routine screening for
is very common for them to fluctuate. However, in a few hepatitis C in pregnancy due to lack of evidence of ben-
women, pruritus and biochemical abnormalities will re- efit16; the same uncertainties apply to pregnant women
solve completely for the remainder of the pregnancy; clini- with ICP. Routine hepatitis C testing is therefore not cur-
cians may then need to reconsider the cause of the original rently recommended in women with suspected or proven
symptoms and why resolution has occurred. There are ICP. Additional investigations (including for hepatitis
many causes of transient liver function test abnormalities, C) should be considered in women and pregnant people
such as drug reactions (e.g. to antibiotics) or non-specific with an atypical or uncertain picture of ICP. This may
viral illnesses. When resolution occurs during pregnancy, include women with markedly elevated transaminases,
it is unlikely that the original diagnosis was correct. In dis- early onset of ICP in the first or second trimester, a rap-
cussion with the woman or pregnant person, ongoing care idly progressive biochemical picture, any features of liver
can usually return to normal, and decisions about timing of failure or evidence of acute infection, or if resolution does
birth should be based on usual obstetric practice, although not occur after birth. [Evidence level 2+]
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INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e99
Three cohort studies of 223 women,17 531 women15 and For many women with ICP, itching will stop very soon
745 women18 with ICP who had routine coagulation testing after birth; in the majority it stops in the first few hours or
reported no cases of prolonged prothrombin time in women days.
with uncomplicated clinical presentations. The small num- Liver function tests are non-specific and can become ab-
ber of abnormal results were in women with alternative di- normal during birth. Alanine transaminase and aspartate
agnoses (such as acute fatty liver of pregnancy). Coagulation transaminase are found in smooth muscle, breast and red
testing is therefore not recommended routinely for women blood cells and may be elevated for other reasons in the im-
and pregnant people with uncomplicated ICP. It should be mediate post-partum period. [Evidence level 4]
considered on an individual basis especially when failure of Women with ICP who have no other diagnoses are usu-
liver synthetic function or failure of fat absorption is sus- ally clinically well; liver function tests and bile acids should
pected. [Evidence level 2+] not be measured until at least 4 weeks after birth, to allow
time for levels to return to a normal range.19 If the woman
or pregnant person is clinically unwell, other or additional
4 . 3 | When should specialist hepatology diagnoses should be suspected and liver function testing
advice be sought? should be repeated sooner, as clinically indicated. [Evidence
level 4]
Evidence Rationale for the
Recommendation quality Strength recommendation
5 | M AT E R NA L A N D
Consider 4 D It is good practice
discussing the to discuss
PE R I NATA L R ISK S
care of women complex or
with severe, very unusual cases 5.1 | What is the maternal morbidity?
early or atypical with relevant
presentation of specialists
what appears to Evidence Rationale for the
be ICP with a Recommendation quality Strength recommendation
hepatologist Advise women 2+ C It is usual clinical
with ICP that practice to discuss
the predominant symptoms with
Women who develop pruritus and abnormalities in symptom is itching. women
liver function and bile acids in the first or second trimes- This can be severe,
may fluctuate and may
ter and especially in the first trimester are more likely to
markedly affect sleep
have an underlying genetic predisposition or an alterna-
Women with ICP 1+ B It is important that
tive or additional diagnosis. Input from a hepatologist
may have a higher women with ICP
and/or a clinician with a special interest in cholestasis to chance of developing continue to have
discuss investigations and treatment options should be pre-eclampsia or normal aspects of
considered. A postnatal referral should also be considered gestational diabetes. antenatal care
for women and pregnant people who do not have reso- They should have
blood pressure and
lution of itch and biochemical abnormalities after birth.
urine monitoring,
[Evidence level 4] and testing for
gestational diabetes
according to national
4 .4 | What is the usual postnatal resolution? guidance
Evidence Rationale for the Itching is the main symptom of ICP. The itching is not
Recommendation quality Strength recommendation specific to any single location; it is often generalised and may
affect the palms of the hands and/or the soles of the feet; it
Confirm the 4 D It is good practice
diagnosis of ICP to ensure that ay vary in intensity.2 For women and pregnant people with
in the postnatal women with ICP gestational pruritus or ICP, there is poor correlation between
period at least have appropriate severity of itch and level of bile acids,8 and regardless of the
4 weeks after birth, follow up diagnosis, itch can be very severe for some women and may
with resolution
negatively impact their emotional wellbeing and mental
of itching and
liver function health. The itching is often more pronounced at night, which
tests returning to can interfere with sleep. [Evidence level 2+]
normal (including Additional symptoms of cholestasis, such as dark urine
bile acids) and pale stools, are infrequently reported.4 Steatorrhoea
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e100 | GREEN-TOP GUIDELINE NO. 43
may occur,20 and women with this symptom may have mal- 5. 2 | What is the risk of stillbirth?
absorption of vitamin K. Jaundice is rare, affecting less than
1% of women with ICP,15 and tends to be mild if it occurs. Evidence Rationale for the
[Evidence level 2+] Recommendation quality Strength recommendation
The incidence of pre-e clampsia was higher in women Advise women with isolated 1+ A Demonstrated in
with ICP (odds ratio [OR] 3.7 [95% CI 3.2–4 .3]): 12.2% ICP and a singleton the meta-a nalysis
of women with ICP had pre- e clampsia compared pregnancy that the risk of of 23 studies.
stillbirth only increases
with 3.4% of women without ICP (228/1876 versus above population rate
3385/94 386).7 As pre-e clampsia can be diagnosed at any once their serum bile
gestation from the mid- s econd trimester, healthcare acid concentration is
professionals should ensure that women and pregnant 100 micromol/L or more:
people with ICP receive ongoing blood pressure and • In women with peak bile
acids 19–39 micromol/L
urinalysis screening for pre-e clampsia alongside review and no other risk factors,
for ICP. 21 [Evidence level 1+] advise them that the risk
In a meta-analysis of more than 5000 women with ICP, of stillbirth is similar to
rates of gestational diabetes were higher in women with the background risk.
ICP (OR 2.4 [95% CI 2.1–2.8]): 13.2% of women with ICP • In women with peak bile
acids 40–99 micromol/L
had already been diagnosed with gestational diabetes com- and no other risk factors,
pared with 5.9% of women without ICP (239/1806 versus advise them that the risk
5571/94 384).7 Additional testing for gestational diabetes is of stillbirth is similar
not currently recommended; risk assessment and testing to the background
for gestational diabetes should follow national guidelines.22 risk until 38–39 weeks'
gestation.
[Evidence level 1+] • In women with peak bile
A large Swedish population- based study of 11 388 acids 100 micromol/L
women with ICP and 113 893 controls found that women or more, advise them
who have had ICP had an increased likelihood of later that the risk of stillbirth
being diagnosed with hepatobiliary disease (hazard ratio is higher than the
background risk
(HR) 2.62 [95% CI 2.47–2 .77]); 15% in women with ICP
versus 6.3% in controls), predominantly due to gall- Advise women with ICP 2+ to 2– D Reported in
that the presence of risk retrospective
stone disease (HR 2.72 [2.55–2 .91]; 11.6% versus 4.6%). 23 factors or co-morbidities cohort studies
However gallstones are common, affecting 5– 25% of (such as gestational diabetes
adults in high income countries, 24 and it is unclear and/or pre-eclampsia and/
whether gallstone disease predates ICP in such women. or multifetal pregnancy)
[Evidence level 2–] appear to increase the risk of
stillbirth and may influence
The same study found an association between ICP decision-making around
and immune-mediated diseases later in life (HR 1.28 timing of planned birth
[1.19–1.38]; 7.2% versus 5.8%). These included diabetes Advise women with ICP and 2– D Reported in a
(HR 1.47 [1.26–1.72]; 1.7% versus 1.2%), thyroid disease a twin pregnancy that the retrospective
(HR 1.30 [1.14–1.47]; 2.5% versus 2.0%), psoriasis (HR risk of stillbirth is higher cohort study from
1.27 [1.07–1.51]; 1.4% versus 1.1%), inf lammatory poly- compared with a twin China.
pregnancy without ICP
arthropathies (HR 1.32 [1.11–1.58]; 1.3% versus 0.9%)
and Crohn's disease (HR 1.55 [1.14–2 .10]; 0.4% versus
0.3%), but not ulcerative colitis (HR 1.21 [0.93–1.58]; Stillbirth remains the major concern for women and
0.6% versus 0.5%). 25 Most of these conditions remain at pregnant people with ICP and for their healthcare prac-
low absolute incidence. The benefit of routine regular titioners. A large systematic review and individual patient
screening for these conditions is not proven in women data meta-analysis of women with ICP reported that, for
and pregnant people after ICP and is not currently rec- singleton pregnancies, the risk of stillbirth only increased
ommended. [Evidence level 2–] above population rate once serum bile acid concentrations
Women with ICP have a reported small increased were 100 micromol/L or more (Table 2).7
chance of a subsequent diagnosis of other conditions, The national stillbirth rates from 28 weeks' gestation for
such as hepatitis C. The UK strategy for hepatitis C de- 2015 for countries contributing to these ICP data varied
tection is based on additional investigations on high-r isk from 0.18% to 0.72% depending on country; the UK still-
groups (e.g. those who have hepatitis B) and does not at birth rate was 0.29%.7
present include women with current or previous ICP. 26 The pathophysiology of stillbirth in ICP is uncertain, but
In general, after an episode of ICP women do not require it is thought that bile acids may cause an acute fetal anoxic
additional screening nor follow up. event possibly due to fetal arrhythmia27 or acute placental
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INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e101
TA BL E 2 Association between peak bile acid concentration and prevalence of stillbirth in singleton pregnancy (adapted from Ovadia et al.)7
Peak bile acid Prevalence of stillbirth Absolute numbers of Hazard ratio (with
concentrations (with 95% CI) stillbirths 95% CI)
National UK stillbirth rate from – 0.29%a – –
28 weeks (2015)
Mild ICP Raised bile acids 0.13% (0.02– 0.38%) 3/2310 Referent
19–39 micromol/L
Moderate ICP 40–99 micromol/L 0.28% (0.08– 0.72%) 4/1412 2.35 (0.52–10.50)
p = 0.2642
Severe ICP ≥100 micromol/L 3.44% (2.05–5.37%) 18/524 30.50 (8.83–105.30)
p < 0.0001
a
95% confidence intervals not given.
vessel spasm.28 In singleton pregnancies, stillbirth was as- Evidence Rationale for the
sociated with peak total bile acid concentration but not with Recommendation quality Strength recommendation
alanine transaminase.7 [Evidence level 1+]
Advise women with 1+ A Demonstrated in the
A 12-month UK Obstetric Surveillance System (UKOSS) moderate or severe meta-a nalysis of 23
study in 2010–2011 reviewed 669 cases of ICP in singleton ICP that they have studies
pregnancy with bile acids 40 micromol/L or more across an increased chance
the UK which included 10 stillbirths.29 Of these, seven had of having meconium
coexistent pregnancy complications (three had gestational stained amniotic fluid
during labour and birth
diabetes; two had pre- eclampsia; two had non- specified
complications). These differences remained significant Advise women with 1+ A Demonstrated in the
moderate or severe meta-a nalysis of 23
against national data and suggest that women with ICP ICP that their baby is studies
and other comorbidities warrant additional surveillance. more likely to receive
[Evidence level 2+] neonatal care
The aetiology of adverse perinatal outcomes, including
stillbirth, in multifetal pregnancies is multifactorial. The In the meta-analysis of more than 5000 women with ICP,
risk of stillbirth in multifetal pregnancies is higher than in women with bile acids ≥40 micromol/L had an increased
singleton pregnancies.30 [Evidence level 2–] overall risk of both spontaneous preterm birth (OR 3.47
One retrospective cohort study from China specifically [95% CI 3.06–3.95]) and iatrogenic preterm birth (OR 3.65
evaluated ICP in twin pregnancies.31 They reviewed 129 twin [1.94–6.85]),7 the latter likely reflecting the policy of ‘active
pregnancies complicated with ICP and 1793 twin pregnan- management’ with planned early birth (despite a limited ev-
cies without ICP (2006–2014). There was an increased risk of idence base for this approach).32 The percentage of women
stillbirth in twin pregnancies with ICP compared with twin with singleton pregnancies who gave birth before 37 weeks
pregnancy without ICP (3.9% versus 0.8%, aOR 5.75 [95% increased with increasing bile acid concentration: 16.5%
CI 2.00–16.6]). This was further stratified as a stillbirth risk of women with bile acids below 40 micromol/L (373/2264),
of 3.3% in women with bile acids of 10–39 micromol/L and 19.1% of women with bile acids 40–99 micromol (261/1368),
5.1% in women with bile acids of 40 micromol/L or more. and 30.5% of women with bile acids 100 micromol/L or more
Stillbirths with ICP in twin pregnancies occurred between (157/514). The majority of multifetal pregnancies were born
33–35 weeks' gestation, compared to 36–38 weeks' gestation preterm.7 [Evidence level 1+]
among singletons. [Evidence level 2–] In the same meta-a nalysis of more than 5000 women
with ICP, there was an increased chance of meconium
stained amniotic f luid (of any grade) in women with
5. 3 | What is the risk of perinatal ICP: OR 2.60 (95% CI 1.62–4 .16).7 The 2010–2 011 UKOSS
morbidity? study of 713 women with bile acids 40 micromol/L or
more found that these women had meconium stained
amniotic f luid at lower gestational ages, and more com-
Evidence Rationale for the monly at 35–38 weeks, when compared with women with-
Recommendation quality Strength recommendation out ICP. 29 The presence of meconium stained amniotic
Advise women with 1+ A Demonstrated in the f luid in labour should be managed using national guid-
moderate or severe meta-a nalysis of 23 ance. 33 [Evidence level 1+]
ICP that they have studies ICP is associated with a small increase in admission to
a higher chance of the neonatal unit: OR 1.47 (95% CI 1.03–2.10).7 There was,
both spontaneous and
however, no difference in the rate of a neonatal 5 min Apgar
iatrogenic preterm birth
score of less than 7,7 (which is associated with increased
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e102 | GREEN-TOP GUIDELINE NO. 43
neonatal morbidity and mortality): OR 1.41 (0.95–2.10).34,35 • Fluctuating bile acid concentrations but peak concentra-
[Evidence level 1+] tions within the boundaries for their current diagnosis.
The 2010–2011 UKOSS study on 713 UK women with ICP [Evidence level 4]
(bile acids 40 micromol/L or more) showed that 45% of neonatal
admissions were due to preterm birth, and 30% due to respira- All women with itch and an initial raised bile acid level,
tory problems.29 Their study had a preterm birth rate of 25%, should have a second bile acid measurement repeated around
with a 15% rate of meconium stained liquor, but no cases of me- 1 week later before any diagnostic or care decisions are deter-
conium aspiration. The median duration of stay in the neonatal mined, as it is common for women with bile acid levels over
unit was 7 days (IQR 2.25–13.75 days).29 [Evidence level 1+] 100 micromol/L and 40–100 micromol/L to have subsequent
bile acid concentrations that are much lower.8
The subsequent frequency at which women and pregnant
6 | HOW SHOU L D WOM E N W I T H people have biochemical assessment will be determined on
ICP BE MON I TOR E D? an individual basis and according to the impact that the re-
sult might have on further care (see Section 8.1):
Evidence Rationale for the
Recommendation quality Strength recommendation • If the woman has mild ICP with peak bile acids 19–39 mi-
cromol/L, they could have weekly testing as they approach
Review women 4 GPP Women with
with ICP within ICP may be 38 weeks' gestation in order to inform timing of birth.
a consultant-led at increased • If the woman has moderate ICP with peak bile acid 40–99 mi-
maternity unit likelihood of cromol/L, especially if they are approaching 35 weeks' gesta-
pregnancy tion, weekly testing should be considered, as timing of birth
complications
may be influenced if levels rise to 100 micromol/L or more.
• If the woman has severe ICP with peak bile acid 100 mi-
The frequency and content of monitoring for women and cromol/L or more, further routine testing of bile acids
pregnant people with ICP should be determined in conjunc- might not impact on decision making and therefore may
tion with the woman or pregnant person and based on the not be routinely required. [Evidence level 4]
amount of discomfort or distress they experience, bile acid
concentrations, gestational age and the presence of other mor-
bidities. This might incorporate review of diagnosis, discus- 6 . 2 | What fetal monitoring should be
sion of maternal and fetal wellbeing, treatment of pruritus, advised?
and need for further biochemical testing. [Evidence level 4]
Evidence Rationale for the
Recommendation quality Strength recommendation
6 .1 | What maternal monitoring should be Clinicians should 3 D Several case studies
advised? be aware that fetal describe fetal death
ultrasound and/or despite close CTG
cardiotocography and/or ultrasound
Evidence Rationale for the
(CTG) do not predict surveillance
Recommendation quality Strength recommendation
or prevent stillbirth
For women with ICP, 4 D Due to the in ICP
consider repeating unpredictable Advise women with 4 D Recommended in
liver function tests and nature of ICP, it is ICP to monitor fetal Saving Babies' Lives
bile acids after 1 week, good practice to movements and Care Bundles version
and then determine offer monitoring present for immediate 2 (2019) for all
frequency on an assessment at their pregnant women
individual basis local maternity unit if
they have any concerns
Maternal itch appears to be poorly correlated to the level of
biochemical abnormality. For women with ICP, ongoing mon- In ICP, there is evidence that cardiotocography (CTG)
itoring of symptoms and biochemical monitoring may show: monitoring or biophysical profile do not predict stillbirth.
Several studies describe fetal death despite close surveillance
• rising bile acid concentrations, and if 100 micromol/L or and previously normal ultrasound scans (including fetal
more, the diagnosis of severe ICP, Doppler measurements), biophysical profile, and/or CTG
• fall in bile acids concentrations into a more reassuring cat- monitoring.31,36,37,38 [Evidence level 3]
egory, such that frequency of monitoring and/or care can ICP is not associated with fetal growth restriction, with
be altered accordingly, no difference in birthweight centiles compared with babies
• spontaneous resolution of itch and biochemical abnor- born to women without ICP,7 and therefore strategies for an-
malities returning to normal levels, in which case the di- tenatal monitoring for placental insufficiency are unlikely to
agnosis should be reconsidered [see above in Section 4.1], be beneficial in women with isolated ICP. [Evidence level 3]
14710528, 2022, 13, Downloaded from https://obgyn.onlinelibrary.wiley.com/doi/10.1111/1471-0528.17206 by Sri Lanka National Access, Wiley Online Library on [25/08/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License
INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e103
7.1 | What impact on maternal symptoms Chlorphenamine has antihistamine properties and may
(itch), maternal biochemistry and fetal outcome have sedative side-effects in some women. The effective-
can be expected? ness of the treatment is uncertain in women and pregnant
people with ICP, and relief may be more related to its seda-
Evidence Rationale for the tive action than a direct effect. There is experience of using
Recommendation quality Strength recommendation chlorphenamine in other conditions in pregnancy (such as
hay fever) and harmful effects have not been reported. Other
Advise women 1+ A Systematic review has
that there are no shown no clear evidence common antihistamine agents including loratadine and ce-
treatments that of maternal or perinatal tirizine are also used in pregnancy for other indications but
improve pregnancy benefit with treatments to do not have sedative side-effects. [Evidence level 4]
outcome (or reduce itching or adverse
raised bile acid perinatal outcomes
concentrations)
and treatments to Ursodeoxycholic acid
improve maternal
itching are of
Evidence Rationale for the
limited benefit
Recommendation quality Strength recommendation
Do not 1+ A The largest randomised
routinely offer controlled trial of
The role of drug treatment in ICP is to try to reduce ma- ursodeoxycholic ursodeoxycholic acid
ternal itching (which may be of variable intensity and is un- acid for the showed no evidence of
related to bile acid concentrations). There is no evidence that purpose of significant benefit
reducing adverse
routine medical treatment improves maternal raised bile acid
perinatal outcomes
concentrations or perinatal outcomes.39 [Evidence level 1+] in women with ICP
concentration or itch score who would benefit.8 [Evidence Use of rifampicin has been reported largely in single
level 1+] cases43 and by questionnaire survey of affected women,44
A systematic review and individual participant meta- but there is no evidence from randomised controlled trials
analysis of ursodeoxycholic acid in ICP included four ran- to support its routine use in ICP. Further research is under-
domised controlled trials of over 800 women (of whom 183 way to evaluate its use in women with ICP.45 In women and
had bile acid of 40 micromol/L or more) with a primary pregnant people with early-onset severe disease, an opinion
outcome of stillbirth and a composite secondary outcome from a specialist in ICP should be sought before considering
of stillbirth and preterm birth.41 Ursodeoxycholic acid had rifampicin treatment. [Evidence level 3]
no impact on the primary endpoint. Spontaneous preterm
birth under 34 weeks' gestation was not reduced (5/387
women taking ursodeoxycholic acid versus 6/366 women 7. 2 | Is there a place for vitamin K use?
taking placebo, aOR 0.75, 95% CI 0.23–2 .51, p = 0.65).
Spontaneous preterm birth under 37 weeks' gestation was Evidence Rationale for the
reduced in women taking ursodeoxycholic acid compared Recommendation quality Strength recommendation
with placebo (18/387 versus 32/366 aOR 0.46, 95% CI 0.25–
Consider maternal 4 D Extrapolation
0.86, p = 0.015). vitamin K treatment from other
In women with bile acid concentrations 40 micromol/L only if there appears to clinical scenarios
or more who are 34–36 weeks' gestation, ursodeoxycholic be reduced absorption of where dietary
acid may offer some benefit in reducing late preterm birth. dietary fats (e.g. presence fat absorption
of steatorrhoea) and/or is impaired, but
However, as with other circumstances where preterm birth
evidence of abnormal routine use in all
occurs42 it is not clear that this reduction results in any ben- prothrombin time if women with ICP is
efit to the baby. The optimal starting gestation and dosing coagulation studies are lacking an evidence
regimen are unclear. Some women and pregnant people with performed base
bile acid concentrations of 40 micromol/L or more may wish
to take ursodeoxycholic acid with a view to prolonging ges-
tation, but as this does not prevent stillbirth, the advantage The experience of experts is that the large majority of
of doing so may be less clear, especially for those with bile women with ICP will not have evidence of reduced fat ab-
acids over 100 micromol/L. sorption9 and routine use of vitamin K treatment is not in-
In the largest trial, maternal bile acid concentrations dicated. If women have symptoms such as steatorrhoea,20
were found to be higher in the group treated with ur- coagulation assessment should be performed and use of vi-
sodeoxycholic acid, 39 possibly as a result of standard tamin K treatment considered (prescribed as a water-soluble
laboratory assays being unable to distinguish between formulation such as menadiol sodium phosphate at a dose of
endogenous and exogenous sources. Ursodeoxycholic acid 10 mg daily). [Evidence level 4]
cannot therefore be recommended for the purpose of re-
ducing this biochemical marker of disease. In the same
trial, women treated with ursodeoxycholic acid had lower 8 | HOW SHOU L D WOM E N BE
alanine transaminase levels than those taking placebo, A DV ISE D ON T I M I NG A N D MODE OF
but the clinical implications of this are uncertain, as al- BI RT H?
anine transaminase levels have no association with still-
birth.7 [Evidence level 1+] 8 .1 | Timing of birth
Evidence Rationale for the The risk of stillbirth in women with peak bile acids of 40–
Recommendation quality Strength recommendation 99 micromol/L was 0.28%. This was not higher than over-
Consider planned birth 1+ A Systematic review all background population risk,7 but did appear to increase
at 38–39 weeks' gestation with individual at around 38–39 weeks' gestation. Although the number of
in women with moderate patient data meta- affected pregnancies is small and the confidence intervals
ICP with peak bile acids analysis reporting
wide, it is reasonable to offer planned birth at this gesta-
40–99 micromol/L and risk of stillbirth,
no other risk factors; stratified by peak tion for women and pregnant people with peak bile acids of
advise them that the maternal bile acid 40–99 micromol/L, or earlier if other comorbidities (such as
overall risk of stillbirth concentration gestational diabetes or pre-eclampsia) are present. [Evidence
is similar to the level 1+]
background risk until
For women with peak bile acids 100 micromol/L or
38–39 weeks' gestation
more, the risk of stillbirth is 3.44%, which is higher than
Consider planned birth 1+ A Systematic review
background population rate, and the risk appears to in-
at 35–36 weeks' gestation with individual
in women with severe patient data meta- crease from 35– 36 weeks' gestation. This information
ICP with peak bile acids analysis reporting should be shared with the woman or pregnant person and
100 micromol/L or more; risk of stillbirth, planned birth considered, based on other factors and the
advise them that the risk stratified by peak woman's preferences. This is in keeping with other studies
of stillbirth is higher maternal bile acid
using different methodologies, including a retrospective
than the background risk concentration
cohort study of 1 604 386 pregnancies assessing compos-
Advise women that 2+ C Evidence
ite perinatal mortality risk48 and a decision modelling
the presence of co- from national
morbidities (such as surveillance case study concluding that 36 weeks' gestation was optimal.49
gestational diabetes, control study [Evidence level 1+]
pre-eclampsia, multifetal supported by In women with ICP and peak bile acids 40 micromol/L
pregnancy) appear other case series or more, co-morbidities may be associated with a greater
to increase the risk demonstrating
risk of stillbirth.29 The presence of and risks related to co-
of stillbirth and may increased
influence decision- stillbirth risk with morbidities should be taken into account when considering
making around timing comorbidities the timing of planned birth. [Evidence level 1+]
of planned birth
Active care in ICP, usually referring to planned birth 8.2 | Mode of birth
around 38 weeks' gestation, came into practice in many set-
tings, including the UK, despite inadequate evaluation of Evidence Rationale for the
its benefit or an understanding of which women with ICP Recommendation quality Strength recommendation
might be at increased risk of adverse perinatal outcomes.
Advise women 2+ D Choices around mode
Previous studies had reported on cohorts of women with that ICP in itself of birth should follow
ICP, often after introduction of active care, and speculated does not impact routine obstetric
that low stillbirth risk is related to such a policy,46,47 but few their choice practice
had evaluated prognostic factors to allow better stratifica- around mode of
birth and that
tion to tailor timing of birth. [Evidence level 1+]
these decisions
A large systematic review and individual patient data should be based
meta-analysis of women with ICP has reported that the on usual obstetric
risk of stillbirth is 0.13% in women with peak bile acids less practice for that
than 40 micromol/L, which is not higher than background woman
population risk.7 Although the risk of stillbirth remains Women and pregnant people with ICP do not have in-
low throughout gestation for these women, the benefits of creased rates of assisted or operative birth compared with
continuing the pregnancy after 40 weeks' gestation may be women without ICP.50 Mode of birth should therefore be
outweighed by the risk, therefore it is reasonable to discuss based on usual obstetric or medical indications. If planned
with the woman or pregnant person whether they wish to early birth is indicated, induction of labour should be con-
continue the pregnancy or have a planned birth. [Evidence sidered unless other reasons for caesarean birth are present.
level 1+] [Evidence level 2+]
14710528, 2022, 13, Downloaded from https://obgyn.onlinelibrary.wiley.com/doi/10.1111/1471-0528.17206 by Sri Lanka National Access, Wiley Online Library on [25/08/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License
e106 | GREEN-TOP GUIDELINE NO. 43
In women who have had ICP, itch usually stops after Combined hormonal contraception can be used in
birth, often in the first few days, and liver function tests and women with ICP (UKMEC 2) provided they do not also
bile acid concentrations should return to normal within a have a history of contraception related cholestasis. It was
few weeks. At postnatal follow-up, the healthcare profes- previously thought that women with a history of ICP may
sional should ensure that itching has resolved and should have an increased risk of developing cholestasis when using
confirm that maternal bile acid concentrations and liver oestrogen-containing hormonal contraception, but this is
function tests have normalised. If itching or biochemical unlikely for the majority of women. The 2016 UKMEC states
abnormalities persist beyond 6 weeks postpartum, consider that in women who have had ICP the advantages of using
other diagnoses depending upon the history and examina- these oestrogen-containing methods outweigh this theoreti-
tion findings. Referral to a hepatologist may be required. cal risk (UKMEC category 2)53 and women may thus choose
[Evidence level 4] to use this method. Resolution of itching and liver function
tests and bile acid concentrations returning to normal lev-
els should be confirmed before commencing this method.
9.1 | What advice should be offered for future [Evidence level 4] Advise women to attend for review if recur-
contraceptive or hormonal options? rence of itch and abnormal liver function tests occur while
using combined hormonal contraception, this would give a
Evidence Rationale for the diagnosis of contraceptive-related cholestasis (UKMEC 3)
Recommendation quality Strength recommendation and alternative contraception options should be discussed.
[Evidence level 4]
Advise women that 4 D Choice of
ICP itself does not contraception For women with an atypical presentation of ICP, atypi-
influence their choice of should follow cal postnatal clinical course, where other diagnoses are sus-
contraception or hormone UK Medical pected, or where itching and liver function tests have not
replacement therapy Eligibility resolved, a personalised approach to contraceptive choice
Criteria
should be undertaken, with provision of information about
(UKMEC)
guidance avoidance of pregnancy with active liver disease.
For menopausal women considering hormonal replace-
For women with 4 D This is in line
ICP and previous with UKMEC ment therapy (HRT), national recommendations should be
cholestasis secondary guidance followed. 54 Current UKMEC guidance is that oestrogen-
to combined hormonal containing contraception can be used in women with a
(oestrogen-containing) history of ICP. It therefore seems reasonable to offer the
contraception, advise
lower physiological dose of oestrogen found in HRT, with
them to use progestogen-
only or non-hormonal review of use if women develop itching or other signs of
methods cholestasis.
In women with previous 4 D Extrapolated
ICP requesting HRT, from UKMEC
consider offering if guidance on 9.2 | How should women be cared for in
there are no other exogenous future pregnancies?
contraindications to use oestrogen use
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e110 | GREEN-TOP GUIDELINE NO. 43
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INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e111
Grades of Recommendation
Grade of Recommendation: A At least one meta-a nalysis, systematic reviews or RCT rated as 1++, and directly applicable to the target
population; or a systematic review of RCTs or a body of evidence consisting principally of studies rated as 1+,
directly applicable to the target population and demonstrating overall consistency of results
Grade of Recommendation: B A body of evidence including studies rated as 2++ directly applicable to the target population, and
demonstrating overall consistency of results; or
Extrapolated evidence from studies rated as 1++ or 1+
Grade of Recommendation: C A body of evidence including studies rated as 2+ directly applicable to the target population, and demonstrating
overall consistency of results; or
Extrapolated evidence from studies rated as 2++
Grade of Recommendation: D Evidence level 3 or 4; or
Extrapolated evidence from studies rated as 2+
A PPE N DI X 2
Comorbidities (particularly pre-eclampsia and diabetes) or other obstetric risk factors (such as multifetal pregnancy),
are associated with increased risk of stillbirth and should be taken into consideration when planning management.
Additional liver investigations may be considered in women with atypical features (e.g. early onset, marked
transaminitis, jaundice, fever, or in whom postpartum resolution does not occur). These investigations may include liver
ultrasound, viral hepatitis screen, liver autoimmune tests, and/or coagulation screen.
14710528, 2022, 13, Downloaded from https://obgyn.onlinelibrary.wiley.com/doi/10.1111/1471-0528.17206 by Sri Lanka National Access, Wiley Online Library on [25/08/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License
INTRAHEPATIC CHOLESTASIS OF PREGNANCY | e113
A PPE N DI X 3
Summary of care for pregnant women with itching and normal skin