Within Group Differences in the Timing of First Sex among Hispanic Adolescents: The Role of Acculturation and Neighborhood Social Environments • Michelle M. Doty, Commonwealth Fund ; Dawn Upchurch, University of California, Los Angeles

Community, Neighborhood and School Effects on Adolescent Sexual Behavior • John O.G. Billy, Battelle- Centers for Public Health Research and Evaluation ; Lisa Cubbins, Battelle- Centers for Public Health Research and Evaluation ; William R. Grady, Battelle- Centers for Public Health Research and Evaluation ; Daniel H. Klepinger, Battelle- Centers for Public Health Research and Evaluation

Contraceptive Use Patterns within First Sexual Relationships • Suzanne Ryan, Child Trends ; Elizabeth Terry-Humen, Child Trends ; Kerry Franzetta, Child Trends

Contraception and Conception among Young Single Women: An International Comparison • Mohamed Ali, World Health Organization (WHO) ; Neeru Gupta, World Health Organization (WHO) ; Iuri da Costa Leite, Escola Nacional de Saúde Pública