Référence: Timed intercourse for couples trying to conceive
Manders, Marlies; McLindon, Luke; Schulze, Brittany; Beckmann, Michael M; Kremer, Jan AM; Farquhar, Cindy Timed intercourse for couples trying to conceive. Cochrane Database of Systematic Reviews 2015: DOI: 10.1002/14651858.CD011345.pub2

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