Fertility and contraception in 12 developed countries.
D000293:Adolescent; D000328:Adult; D003267:Contraception / Q000379:methods / Q000639:trends*; D005060:Europe; D005191:Family Characteristics; D005260:Female; D005298:Fertility; D007722:Health Knowledge, Attitudes, Practice; D006306:Health Surveys; D006801:Humans; D008297:Male; D008393:Marriage; D008875:Middle Aged; D012959:Socioeconomic Factors; D014481:United States