Declining trends in world fertility.
D001723:Birth Rate; D003710:Demography; D005193:Family Planning Services; D005298:Fertility; D006285:Health Planning; D011153:Population; D011155:Population Control; D011157:Population Dynamics; D011158:Population Growth; D015397:Program Evaluation
Birth Rate; Demographic Effectiveness; Demographic Factors; Family Planning; Family Planning Program Evaluation; Family Planning Programs; Fertility; Fertility Measurements; Fertility Rate; Population; Population Dynamics; Population Growth