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
P. Frank-Herrmann, G. Freundl, Ch. Gnoth, E. Godehardt, J. Kunert, S. Baur, U. SottongТом:
13
Мова:
english
Сторінки:
11
DOI:
10.1023/a:1006551921219
Date:
June, 1997
Файл:
PDF, 172 KB
english, 1997