Population Birth control Children Population policy Statistics Women's health services Birth control--Developing countries Breastfeeding Contraception Contraceptives Crimes against Demography Education--Developing countries Family planning Family size--Statistics Fertility--Statistics Infants--Developing countries--Nutrition Marriage customs and rites--Statistics Maternal health services Maternal health services--Developing countries Mortality Mothers Population--Statistics Reproductive health--Developing countries Sexually transmitted diseases--Developing countries--Prevention Study and teaching United States United States--Census Women Women--Developing countries