[The increasing number of extra marital deliveries a sociological phenomenon (author's transl)].

Recent statistical results show an increase in extra-marital life birth. The number of older women between 26 and 28 years of age who have extra-marital deliveries has especially increased. The number of single parent families has more than doudled in the last three decades. The number of 26--28 year-old women who married following conception and then had marital deliveries has markedly decreased. Does monogamy no longer appear to offer a measure of personal happiness to the older working women? Is the social prestige of marriage and maternity within marriage less attractive to the emancipated woman?