المؤلفون: Tatum, Howard J., Beltran, Renalto Saavedra, Ramos, Rebecca, Van Kets, Henry, Sivin, Irving, Schmidt, Frederick H., Tatum, H J, Beltran, R S, Ramos, R, Van Kets, H, Sivin, I, Schmidt, F H

المصدر: American Journal of Obstetrics & Gynecology; Nov96, Vol. 175 Issue 5, p1231-1235, 5p, 4 Black and White Photographs, 2 Charts

مصطلحات موضوعية: POSTPARTUM contraception, INTRAUTERINE contraceptives, CLINICAL trials, COMPARATIVE studies, RESEARCH methodology, MEDICAL cooperation, PUERPERIUM, RESEARCH, EVALUATION research, RANDOMIZED controlled trials