title: Age at menarche, socio-sexual behavior, and fertility.
mesh_terms: D000293:Adolescent; D001741:Black or African American; D000367:Age Factors; D002648:Child; D003268:Contraception Behavior; D005260:Female; D005298:Fertility; D006801:Humans; D008423:Maternal Age; D008572:Menarche; D009519:New York City; D012725:Sexual Behavior; D012741:Sexual Maturation; D012919:Social Behavior; D012923:Social Class