A woman who has acquired any kind of professional skill ought, both for her own sake and for that of the community, to be free to continue to exercise this skill in spite of motherhood. She may be unable to do so during the later months of pregnancy and during lactation, but a child over nine months old ought not to form an insuperable barrier to its mother's professional activities. Whenever society demands of a mother sacrifices to her child which go beyond reason, the mother, if she is not unusually saintly, will expect from her child compensations exceeding those she has a right to expect.