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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.
Frank-Herrmann P, Freundl G, Gnoth C, Godehardt E, Kunert J, Baur S, Sottong U. Frank-Herrmann P, et al. Adv Contracept. 1997 Jun-Sep;13(2-3):179-89. doi: 10.1023/a:1006551921219. Adv Contracept. 1997. PMID: 9288336
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.
Frank-Herrmann P, Heil J, Gnoth C, Toledo E, Baur S, Pyper C, Jenetzky E, Strowitzki T, Freundl G. Frank-Herrmann P, et al. Hum Reprod. 2007 May;22(5):1310-9. doi: 10.1093/humrep/dem003. Epub 2007 Feb 20. Hum Reprod. 2007. PMID: 17314078
A new method to detect significant basal body temperature changes during a woman's menstrual cycle.
Freundl G, Frank-Herrmann P, Brown S, Blackwell L. Freundl G, et al. Among authors: frank herrmann p. Eur J Contracept Reprod Health Care. 2014 Oct;19(5):392-400. doi: 10.3109/13625187.2014.948612. Epub 2014 Aug 27. Eur J Contracept Reprod Health Care. 2014. PMID: 25159914
Estimated maximum failure rates of cycle monitors using daily conception probabilities in the menstrual cycle.
Freundl G, Godehardt E, Kern PA, Frank-Herrmann P, Koubenec HJ, Gnoth Ch. Freundl G, et al. Among authors: frank herrmann p. Hum Reprod. 2003 Dec;18(12):2628-33. doi: 10.1093/humrep/deg488. Hum Reprod. 2003. PMID: 14645183
[How do self-observed cycle symptoms correlate with ovulation?].
Gnoth C, Frank-Herrmann P, Bremme M, Freundl G, Godehardt E. Gnoth C, et al. Zentralbl Gynakol. 1996;118(12):650-4. Zentralbl Gynakol. 1996. PMID: 9082700 German.
Natural family planning.
Freundl G, Frank-Herrmann P. Freundl G, et al. Lancet. 1995 Sep 16;346(8977):774-5; author reply 775-6. Lancet. 1995. PMID: 7658891 No abstract available.
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