in my mother's ferocious striving to give me 'everything,' she had never considered that giving me 'everything' would make me (1) different (from her), and (2) guilty (about what I got). Different and Guilty are not the stuff on which comradeship is built.
Biological possibility and desire are not the same as biological need. Women have childbearing equipment. For them to choose not to use the equipment is no more blocking what is instinctive than it is for a man who, muscles or no, chooses not to be a weightlifter.