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Journal of Reproduction and Fertility|November 1, 1977
The distribution of events in the human menstrual cycleJ R Udry, N M MorrisJournal of Youth and Adolescence|December 10, 2013
Validation of a self-administered instrument to assess stage of adolescent developmentN M Morris, J R UdryFamily Planning Perspectives|May 1, 1996
Early predictors of nonmarital first pregnancy and abortionJ R Udry, J Kovenock, N M MorrisJournal of Biosocial Science|July 1, 1995
Androgen effects on women's gendered behaviourJ R Udry, N M Morris, J KovenockFertility and Sterility|April 1, 1977
A study of the relationship between coitus and the luteinizing hormone surgeN M Morris, J R Udry, L E UnderwoodDemography|November 1, 1976
The effect of subsidized family planning services on reproductive behavior in the United States, 1969-1974J R Udry, K E Bauman, N M MorrisArchives of Sexual Behavior|February 1, 1987
Marital sex frequency and midcycle female testosteroneN M Morris, J R Udry, F Khan-Dawood, et al.Archives of Sexual Behavior|June 1, 1995
Childhood precursors of age at first intercourse for femalesJ R Udry, J Kovenock, N M Morris, et al.Fertility and Sterility|January 1, 1985
Serum androgenic hormones motivate sexual behavior in adolescent boysJ R Udry, J O Billy, N M Morris, et al.Pageof 6