(en) P. Frank-Herrmann, G. Freundl, Ch. Gnoth et E. Godehardt, « Natural family planning with and without barrier method use in the fertile phase: efficacy in relation to sexual behavior: a German prospective long-term study », Advances in Contraception, vol. 13, no 2, , p. 179–189 (ISSN1573-7195, DOI10.1023/A:1006551921219, lire en ligne, consulté le )
(en) Marguerite Duane, Alison Contreras, Elizabeth T. Jensen et Amina White, « The Performance of Fertility Awareness-based Method Apps Marketed to Avoid Pregnancy », The Journal of the American Board of Family Medicine, vol. 29, no 4, , p. 508–511 (ISSN1557-2625 et 1558-7118, PMID27390383, DOI10.3122/jabfm.2016.04.160022, lire en ligne, consulté le )
(en) P. Frank-Herrmann, G. Freundl, Ch. Gnoth et E. Godehardt, « Natural family planning with and without barrier method use in the fertile phase: efficacy in relation to sexual behavior: a German prospective long-term study », Advances in Contraception, vol. 13, no 2, , p. 179–189 (ISSN1573-7195, DOI10.1023/A:1006551921219, lire en ligne, consulté le )
has-sante.fr
HAS, État des lieux des pratiques contraceptives et des freins à l’accès et au choix d’une contraception adaptée, (lire en ligne), p. 27
issn.org
portal.issn.org
(en) P. Frank-Herrmann, G. Freundl, Ch. Gnoth et E. Godehardt, « Natural family planning with and without barrier method use in the fertile phase: efficacy in relation to sexual behavior: a German prospective long-term study », Advances in Contraception, vol. 13, no 2, , p. 179–189 (ISSN1573-7195, DOI10.1023/A:1006551921219, lire en ligne, consulté le )
(en) Marguerite Duane, Alison Contreras, Elizabeth T. Jensen et Amina White, « The Performance of Fertility Awareness-based Method Apps Marketed to Avoid Pregnancy », The Journal of the American Board of Family Medicine, vol. 29, no 4, , p. 508–511 (ISSN1557-2625 et 1558-7118, PMID27390383, DOI10.3122/jabfm.2016.04.160022, lire en ligne, consulté le )
(en) Marguerite Duane, Alison Contreras, Elizabeth T. Jensen et Amina White, « The Performance of Fertility Awareness-based Method Apps Marketed to Avoid Pregnancy », The Journal of the American Board of Family Medicine, vol. 29, no 4, , p. 508–511 (ISSN1557-2625 et 1558-7118, PMID27390383, DOI10.3122/jabfm.2016.04.160022, lire en ligne, consulté le )
(en) Marguerite Duane, Alison Contreras, Elizabeth T. Jensen et Amina White, « The Performance of Fertility Awareness-based Method Apps Marketed to Avoid Pregnancy », The Journal of the American Board of Family Medicine, vol. 29, no 4, , p. 508–511 (ISSN1557-2625 et 1558-7118, PMID27390383, DOI10.3122/jabfm.2016.04.160022, lire en ligne, consulté le )
(en) P. Frank-Herrmann J. Heil C. Gnoth E. Toledo S. Baur C. Pyper E. Jenetzky T. Strowitzki G. Freundl, « The effectiveness of a fertility awareness based method to avoid pregnancy in relation to a couple's sexual behaviour during the fertile time: a prospective longitudinal study », Human Reproduction, Volume 22, Issue 5, 1 May 2007, , Pages 1310–1319 (lire en ligne)
