Family planning and infant mortality rate decline in the United States.
D000028:Abortion, Induced; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001722:Birth Order; D000013:Congenital Abnormalities / Q000401:mortality; D003267:Contraception; D004651:Employment; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D007086:Illegitimacy; D007182:Income; D007223:Infant; D007224:Infant Care; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D008393:Marriage; D008423:Maternal Age; D009042:Motivation; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D014481:United States