Contraceptive use and demographic trends in El Salvador.
D000028:Abortion, Induced; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001723:Birth Rate; D003267:Contraception / Q000379:methods; D003268:Contraception Behavior; D003710:Demography; D004544:El Salvador; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006040:Goals; D006801:Humans; D008875:Middle Aged; D009026:Mortality; D011247:Pregnancy; D012424:Rural Population; D014505:Urban Population