Référence: Cumulative pregnancy rates in patients with apparently normal fertility and fertility-focused intercourse
Hilgers, T. W.; Daly, K. D.; Prebil, A. M.; Hilgers, S. K. Cumulative pregnancy rates in patients with apparently normal fertility and fertility-focused intercourse. The Journal of Reproductive Medicine 1992: PMID: 1479570

Divers

Autre, divers: Unions sexuelles les jours reconnus comme fertile .. voir plus ..