The first documented case of sisters with transsexualism is reported. Given the low incidence of female transsexualism this is a most unlikely event and suggests that familial factors may be of aetological importance.
SabalisF. F.FrancesA.AppenzellerM. S. W.The three sisters: transsexual male siblings. Am. J. Psychiat. 1974;131: 907–909.
5.
McKeeE. A.RobackH. B.HollenderM. H.Transsexualism in two male triplets. Am. J. Psychiat. 1976;133: 334–337.
6.
HoenigJ.KennaJ. C.The prevalence of transsexualism in England and Wales. Brit. J. Psychiat. 1974;124: 181–190.
7.
RossM. W.WalinderJ.LundstromB.Crosscultural approaches to transsexualism. Acta Psychiatric Scandinavica. 1981;63:75–82.
8.
EicherW.SpoljarM.CleveH.H-Y antigens in transsexuality. Lancet. 1979;2: 1137–1138.
9.
HoenigJ.KennaJ. C.EEG abnormalities and transsexualism. Brit. J. Psychiat. 1979;134: 293–300.
10.
SeylerL. E.CanalisE.SpareS.Abnormal gonadotropin secretory responses to LRH in transsexual women after diethylstilbestrol priming. J. Clin. Endo. Metab. 1978;47: 176–183.
