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    Oogenesis

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    Israa Ahmed
    The document outlines the timeline of oogenesis from birth through ovulation, highlighting key stages including follicular growth, meiosis, and fertilization. It also examines the hormonal regulation of oogenesis by progesterone, estrogen, FSH, and LH and discusses the clinical relevance of oogenesis in relation to age

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    © All Rights Reserved
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    Oogenesis

    Uploaded by

    Israa Ahmed
    793 views18 pages
    The document outlines the timeline of oogenesis from birth through ovulation, highlighting key stages including follicular growth, meiosis, and fertilization. It also examines the hormonal regulation of oogenesis by progesterone, estrogen, FSH, and LH and discusses the clinical relevance of oogenesis in relation to age

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    The document outlines the timeline of oogenesis from birth through ovulation, highlighting key stages including follicular growth, meiosis, and fertilization. It also examines the hormonal regulation of oogenesis by progesterone, estrogen, FSH, and LH and discusses the clinical relevance of oogenesis in relation to age

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    793 views18 pages

    Oogenesis

    Uploaded by

    Israa Ahmed
    The document outlines the timeline of oogenesis from birth through ovulation, highlighting key stages including follicular growth, meiosis, and fertilization. It also examines the hormonal regulation of oogenesis by progesterone, estrogen, FSH, and LH and discusses the clinical relevance of oogenesis in relation to age

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 18

    AL-Zaiem AL-Azhary University

    Fauclty of Medicine
    Human Anatomy MSC. Program
    General Embryology

    OOGENESIS
    Dr. Israa Ahmed Ali
    Faculty of Dentistry, International University of Africa, Sudan
    Contents

    Gametogenesis

    Oogenesis

    Hormonal regulation

    Clinical relevance

    2 6/25/22
    Learning outcomes

    Discuses the clinical


    relevance of oogenesis

    Explain the hormonal


    regulation of oogenesis
    Identify the key events and
    features along the timeline
    of oogenesis
    Address the two
    processes of oogenesis
    Outline the purpose of
    oogenesis

    3 6/25/22
    Gametogenesis
    Definition
     The process of production of mature gamets (sperms ,
    ovum) from the gonads .

    4 6/25/22
    Gametogenesis

    Purpose

     To produce haploid daughter cells (reduce the


    chromosomes numbers by its half) .

    5 6/25/22
    Oogenesis
    Definition

     The process of production mature haploid


    ovum ready for fertilization.
     Mostly takes place in the cortex of the ovaries.

    Timing

     From the 12th week IU to menopause.


     During the fertile period of a female, one mature
    ovum is developed every 28 days.

    6 6/25/22
    Oogenesis
    The ovaries

    7 6/25/22
    Oogenesis

    Maturatio
    n
    of
    follicular Maturation
    cells Of
    the 1ry oocyte

    The two process


    Of
    oogenesis

    8 6/25/22
    Oogenesis

    9 6/25/22
    10 6/25/22
    Oogenesis
    Key events along the timeline of
    oogenesis

    Birth Ovulation
    Diffrintion of • .Follicular growth • Occurs in uterine •
    One follicle • .tube
    stem cell to .Primary follicles • Graffin follicle •
    Completes Meiosis-2 •
    oogonum .1ry oocytes • .meiosis-1 .rupture .completed
    Meiosis-1 paused at • .2ry oocytes •
    Meiosis-2 paused • Fertilizatio
    12th M IU .pro-phase
    Puberty .at metaphase n

    11 6/25/22
    Oogenesis

    No ovulation occurs during


    pregnancy, what is the reason in
    your opinion?

    12 6/25/22
    Oogenesis
    Hormonal regulation
    of
    oogenesis

    PROGESTRONE
    ESTROGEN

    FSH
    LH

    13 6/25/22
    Oogenesis
    Clinical relevance
    of
    oogenesis

    Age Chemotherapy
    & &
    Infertility Radiotherapy

    Oral
    contraceptives

    14 6/25/22
    Further readings

     Ovarian cycle.

     Uterine cycle (menstrual cycle).

    15 6/25/22
    References

    16 6/25/22
    17 6/25/22
     Thank you 

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