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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. Among authors: sottong u. Adv Contracept. 1997 Jun-Sep;13(2-3):179-89. doi: 10.1023/a:1006551921219. Adv Contracept. 1997. PMID: 9288336
[Results of a physician survey on the status of knowledge and attitude to natural family planning in West Germany 1988].
Döring G, Baur S, Frank-Herrmann P, Freundl G, Sottong U. Döring G, et al. Among authors: sottong u. Geburtshilfe Frauenheilkd. 1990 Jan;50(1):43-8. doi: 10.1055/s-2007-1026430. Geburtshilfe Frauenheilkd. 1990. PMID: 2311905 German.
Effectiveness and acceptibility of the symptothermal method of natural family planning in Germany.
Frank-Herrmann P, Freundl G, Baur S, Bremme M, Döring GK, Godehardt EA, Sottong U. Frank-Herrmann P, et al. Among authors: sottong u. Am J Obstet Gynecol. 1991 Dec;165(6 Pt 2):2052-4. doi: 10.1016/s0002-9378(11)90580-8. Am J Obstet Gynecol. 1991. PMID: 1755469
[Has family planning behavior in West Germany changed since 1985?].
Freundl G, Baur S, Bremme M, Frank-Herrmann P, Godehardt E, Kunert J, Sottong U. Freundl G, et al. Among authors: sottong u. Geburtshilfe Frauenheilkd. 1991 Feb;51(2):127-34. doi: 10.1055/s-2007-1023688. Geburtshilfe Frauenheilkd. 1991. PMID: 2040411 German.
[Results of a representative survey of family planning behavior in West Germany 1985].
Döring G, Baur S, Frank P, Freundl G, Sottong U. Döring G, et al. Among authors: sottong u. Geburtshilfe Frauenheilkd. 1986 Dec;46(12):892-7. doi: 10.1055/s-2008-1036340. Geburtshilfe Frauenheilkd. 1986. PMID: 3817410 German.
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