A large genome-wide association study of more than 560,000 people has identified 10 new genetic regions associated with the number of children we have during the course of our life, and the age at which we have our first child. Nicola Barban et al identified ten new areas of the DNA sequence that are related with the age at first birth and the number of children ever born. Image credit: Vania Raposo. Until now, human reproductive behavior was thought...
