Teenage pregnancy in developing countries.
D000293:Adolescent; D001723:Birth Rate; D002648:Child; D003466:Cultural Characteristics; D003906:Developing Countries; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D008428:Maternal Mortality; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D011627:Puberty; D012725:Sexual Behavior