This study will consist in creating groups for women according to the age when they first give birth (18 years old or less / 19-24 / 25-29 / 30 and more / childless), social origin (socio-professional category to which their parents belong or belonged based on the data from the Permanent Demographic Sample) and other sociodemographic variables (employed or unemployed, living as a couple, head of a single parent family, living in social housing). These groups will then be linked to each observation point (population census) where the EDP is present. The generational effect on the mechanisms will also be studied.
