title: Some preliminary observations on pre-adult fertility and family formation.
mesh_terms: D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000367:Age Factors; D001290:Attitude; D002648:Child; D003075:Coitus; D003267:Contraception; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D007086:Illegitimacy; D008423:Maternal Age; D011247:Pregnancy; D012725:Sexual Behavior; D012959:Socioeconomic Factors; D014481:United States