Individual and familial influences on the onset of sexual intercourse among urban African American adolescents.

A sample of 198 African American families, living in urban poverty, participated in a longitudinal study of adolescent sexual development beginning when children were in the 4th or 5th grade. Self-reports of family conflict and pubertal development and videotaped family interaction data were collected at 2 time points approximately 2 years apart. Youths reported on sexual debut at each time point. More boys than girls reached sexual debut early. Greater levels of family conflict predicted early sexual debut. Observational data indicated more developed preadolescents with greater family conflict and less positive affect were least likely to delay debut. Changes in pubertal development and observed family conflict were associated with early debut. Possible mediating mechanisms and implications for preventive interventions are discussed.