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Fertility and Sterility|July 1, 1996
Prospective study showing that antisperm antibodies are not associated with pregnancy lossesJ L Simpson, S A Carson, J L Mills, et al.
American Journal of Public Health|March 1, 1997
Adverse outcomes of planned and unplanned pregnancies among users of natural family planning: a prospective studyA Bitto, R H Gray, J L Simpson, et al.
Human Reproduction (Oxford, England)|September 18, 1998
Unintended pregnancies in women delivering at 18 South American hospitals. NFP-ECLAMC Group. Latin American Collaborative Study of Congenital MalformationsE C Gadow, J E Paz, J S López-Camelo, et al.
Advances in Contraception : the Official Journal of the Society for the Advancement of Contraception|December 1, 1988
Pregnancy outcome associated with natural family planning (NFP): scientific basis and experimental design for an international cohort studyJ L Simpson, R H Gray, J T Queenan, et al.
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)|February 1, 1987
Verification of early pregnancy tests in a multicenter trialL Jovanovic, M Singh, B B Saxena, et al.
Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Metabolisme|July 1, 1986
Gestational diabetes mellitus: a syndrome with phenotypic and genotypic heterogeneityN Freinkel, B E Metzger, R L Phelps, et al.
Journal of the National Cancer Institute|November 1, 1980
Cancer mortality in a human isolateA O Martin, J K Dunn, J L Simpson, et al.
Genetics in Medicine : Official Journal of the American College of Medical Genetics|March 17, 2001
Gender verification of female athletesL J Elsas, A Ljungqvist, M A Ferguson-Smith, et al.
Human Reproduction (Oxford, England)|September 1, 1996
Further evidence that infection is an infrequent cause of first trimester spontaneous abortionJ L Simpson, R H Gray, J T Queenan, et al.
Fetal Diagnosis and Therapy|March 1, 1993
Inability to detect fetal metaphases in flow-sorted lymphocyte cultures based on maternal-fetal HLA differencesA T Tharapel, V L Jaswaney, M E Dockter, et al.
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