Declines in the age and family size of family planning program acceptors: international trends.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003276:Contraceptives, Oral; D005191:Family Characteristics; D005193:Family Planning Services / Q000639:trends*; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008297:Male; D013245:Sterilization, Reproductive
D003276:Contraceptives, Oral