title: Variability and heritability of human fertility.
mesh_terms: D000328:Adult; D001723:Birth Rate; D002648:Child; D003710:Demography; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D005826:Genetics, Medical; D006801:Humans; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D013997:Time Factors