The project to construct a multidisciplinary study cohort of 20,000 children to be monitored from birth to adulthood was launched in France in 2005. It was designed to address the concerns of various public bodies, especially those concerned with the environment, and researchers from a variety...

It was in 1946 that Great Britain embarked on the world?s first ever large-scale child cohort study, designed to track participants from birth to adulthood. Half a century on, this study is still going strong and has been extended to include the second generation, namely children born to the...

Toulemon (Laurent), Leridon (Henri).- Birth control and Social Group: Contraception, Accidental Pregnancies and Abortion The dramatic diffusion of medical contraceptive methods during the past 20 years in France has led to more homogeneous behaviour in different social groups. It has become easy...

Leridon Henri. ? The decline of fertility since 1965 : less wanted births and less unwanted pregnancies. Data from the French Fertility Survey carried out by INED in 1978 make possible a decomposition of the evolution in the number of births into three parts : change in the number of unwanted...

Leridon Henri. ? A Constant Rate of Increase as a Demographic Objective and Method of Projection. The principal object of population policy is generally the maintenance of a given rate of (natural) population growth rather than that of a given level of fertility. It is not, therefore, possible...