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Pregnancy
Hispanic Americans
Young Adult
European Continental Ancestry Group
African Americans
Texas
Pregnancy in Adolescence
Questionnaires
Adolescent Behavior
Sexual Behavior
Health Knowledge, Attitudes, Practice
Risk Factors
Cross-Sectional Studies
Logistic Models
Poverty
Bone Density
Medroxyprogesterone Acetate
Female Contraceptive Agents
Hymen
Substance-Related Disorders
Co-Publications
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