More and more men have no children. In 2011, this was the case for 21% of men born between 1961 and 1965. This increase arose partly from the rise in the proportion of men never having lived as a couple, but not only: increased infertility also concerns men who have lived as a couple (12% of them had no children in 2011). The proportion of childless women, measured at the end of their reproductive years, only increased for the last generations observed (13.5% of women born between 1961 and 1965 had no children). This recent increase in infertility in women is accompanied by a fall in large families, especially among immigrants. Women born between 1961 and 1965 had on average 1.99 children; this was substantially less than older generations (2.48 for women born between 1931 and 1935). For women, the disparities in child-bearing by level of qualifications and social category have greatly diminished over the last thirty years. They have not however disappeared: executive women born between 1961 and 1965 more often remained childless and, when they did have children, they had fewer. Women with no qualifications had on average a lot more children than qualified women. The convergence in the number of children according to social category also existed for men who had children, in a more defined way than for women. However, the gaps in terms of infertility were not reduced among men. In particular, the recent increase in infertility is very marked among employees, workers and executives.