I saw this film 50 years ago, and already then it impressed me as possibly Ingmar Bergman's best film. It's the closest he ever got to a documentary, and the whole film is shatteringly replenished with intimate close-ups of three mothers at the last stage of the most interesting condition for a woman, two of them giving births, the third being there after a failed abortion. There are other women as well, some nurses and two female visitors but very few men, four altogether, two of them being doctors and two husbands, a failed one and Max von Sydow. The finest acting is presented by Ingrid Thulin, who introduces the film with her passionate and shattering martyrdom and who stays the dominating element of the film although only resignedly from the background; but all these characters are given their own life and space and important part in this every day shattering drama of life, death and birth in totally organic realism.
Seeing it again after 50 years and on the centennial of Ingmar Bergman's birth. it roused an enormous interest in Bergman's other early films from the 50s, which used to be his best, but this is still for me number one.