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Archives of Sexual Behavior|February 1, 1985
Oral sex in an adolescent populationS F Newcomer, J R UdryArchives of Sexual Behavior|February 1, 1994
Effects of repeated questionnaire administration in longitudinal studies of adolescent males' sexual behaviorC T Halpern, J R Udry, C SuchindranArchives of Sexual Behavior|October 31, 1998
Monthly measures of salivary testosterone predict sexual activity in adolescent malesC T Halpern, J R Udry, C SuchindranPsychosomatic Medicine|March 1, 1997
Testosterone predicts initiation of coitus in adolescent femalesC T Halpern, J R Udry, C SuchindranDemography|February 1, 1980
Parity-specific and two-sex utility models of reproductive intentionsE S Fried, S L Hofferth, J R UdryPopulation Studies|November 17, 2011
Population growth rates in perfect contraceptive populationsJ R Udry, K E Bauman, C L ChaseDevelopmental Psychology|June 25, 1999
Effects of body fat on weight concerns, dating, and sexual activity: a longitudinal analysis of black and white adolescent girlsC T Halpern, J R Udry, B Campbell, et al.The Journal of Adolescent Health : Official Publication of the Society for Adolescent Medicine|March 8, 2000
Smart teens don't have sex (or kiss much either)C T Halpern, K Joyner, J R Udry, et al.Social Biology|January 1, 1993
Relationships between aggression and pubertal increases in testosterone: a panel analysis of adolescent malesC T Halpern, J R Udry, B Campbell, et al.Psychosomatic Medicine|September 1, 1993
Testosterone and pubertal development as predictors of sexual activity: a panel analysis of adolescent malesC T Halpern, J R Udry, B Campbell, et al.Pageof 6