title: Letter: Net reproduction-rates.
mesh_terms: D000293:Adolescent; D000328:Adult; D001723:Birth Rate; D004739:England; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D011155:Population Control; D011158:Population Growth; D012098:Reproduction; D014798:Vital Statistics