Aspects of population.
D000024:Abortion, Illegal; D001723:Birth Rate; D003267:Contraception; D003441:Crowding; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008017:Life Expectancy; D008297:Male; D011153:Population; D011155:Population Control; D011156:Population Density; D011158:Population Growth; D011247:Pregnancy; D012725:Sexual Behavior