Conditions of fertility decline in developing countries, 1965--75.
D000293:Adolescent; D000328:Adult; D001723:Birth Rate; D003906:Developing Countries; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D008297:Male; D008875:Middle Aged; D009313:National Health Programs; D012044:Regression Analysis; D012959:Socioeconomic Factors