title: Demography and genetics of human twinning in the Utah Mormon Genealogy.
mesh_terms: D000328:Adult; D001723:Birth Rate; D003710:Demography; D005260:Female; D005298:Fertility; D005789:Genealogy and Heraldry; D005823:Genetics; D006801:Humans; D008297:Male; D008423:Maternal Age; D010375:Pedigree; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012744:Sex Ratio; D014589:Utah / Q000208:ethnology