title: Twin Studies.
authors.forename: Nancy L
authors.initials: NL
authors.lastname: Segal
mesh_terms: D016640:Diabetes, Gestational; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D018433:Twin Studies as Topic; D014428:Twins, Conjoined; D014430:Twins, Monozygotic