Figure 1: Fecundity of female relatives of heterosexual men compared to homosexual men. For the homosexual but not the heterosexual cohort the maternal female relatives had significantly more children per woman. Source: Camperio, Ciani A. and Pellizzari, E. “Fecundity of Paternal and Maternal Non-Parental Female Relatives of Homosexual and Heterosexual Men.” PLoS One, 2012.