Comparisons: the United States and Britain.
D000328:Adult; D003267:Contraception / Q000379:methods; D003268:Contraception Behavior; D003276:Contraceptives, Oral; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D007434:Intrauterine Devices; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D013245:Sterilization, Reproductive; D006113:United Kingdom; D014481:United States
D003276:Contraceptives, Oral