[Certain reasons of high birth-rate of the population of developing countries].
D000349:Africa; D001208:Asia; D001723:Birth Rate; D006801:Humans; D011158:Population Growth; D011593:Psychology, Social; D012959:Socioeconomic Factors; D013020:South America
O nekotorykh prichinakh vysokoĭ plodovitosti naseleniia razvivaiushchikhsia stran.