Do the partners of dizygotic schizophrenic twins run a greater risk of schizophrenia than ordinary siblings?
An exceptionally high incidence in dizygotic co-twins of schizophrenic index cases, together with normal incidence in siblings, was reported by M. Fischer in 1973. Apart from chance fluctuation, a methodological explanation for the difference is suggested.
D004200:Diseases in Twins; D005260:Female; D006801:Humans; D011247:Pregnancy; D012306:Risk; D012559:Schizophrenia / Q000453:epidemiology / Q000235:genetics*; D014427:Twins; D014429:Twins, Dizygotic