Référence: Fertility awareness-based methods for contraception Grimes, David A; Gallo, Maria F; Halpern, Vera; Nanda, Kavita; Schulz, Kenneth F; Lopez, Laureen M Fertility awareness-based methods for contraception. Cochrane Database of Systematic Reviews 2004: DOI: 10.1002/14651858.CD004860.pub2 |
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