title: Excessive twinning in a rural American genealogy: the demographic pedigree.
abstract: Excessive twinning in an extended family of rural Missouri concentrates in the isolated generations of 1874-1930s. Moderate inbreeding, larger sibships to older mothers, and access to local doctors may have combined to enhance this familial twinning. These biosocial factors are similar to an isolated case of excessive twinning in Scotland.
authors.affiliation: Department of History and Anthropology, Central Missouri State University, Warrensburg.
authors.forename: J W
authors.initials: JW
authors.lastname: Sheets
mesh_terms: D001723:Birth Rate; D003241:Consanguinity; D005191:Family Characteristics; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008297:Male; D008423:Maternal Age; D008923:Missouri; D010375:Pedigree; D012424:Rural Population; D012606:Scotland; D014427:Twins