, Volume 27, Issue 5, pp 475-492

A Follow-Up Study for Estimating the Effectiveness of a Cross-Gender Hormone Substitution Therapy on Transsexual Patients

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Abstract

This follow-up study was carried out to validate the effectiveness of cross-gender hormone therapy embedded in a multistep treatment concept for transsexual patients. This therapy described in detail by the authors elsewhere and presented briefly below provides cross-gender hormone substitution to obtain an assimilation of secondary sex characteristics to the desired sex as quickly as possible. Personal and social background data of 46 male-to-female (M-to-F) and 42 female-to-male (F-to-M) patients passing through different stages of the treatment concept were included. In the Endocrinological Outpatient Clinic of the Max-Planck-Institute/Munich the effectiveness of cross-gender hormone replacement therapy as well as frequency and distribution of side effects were examined by follow-up examination of endocrinological parameters. Cross-gender hormones were administered either parenterally or orally. Blood samples were collected routinely after 2 to 6 months depending on the duration of hormone substitution and complication rate. The incidence of hyperprolactinemia in estrogen-treated M-to-F transsexuals lies in the range of studies published before, whereas the number of patients developing galactorrhea is significantly lower in our patients. The incidence of thromboembolic events during the time of cross-gender hormone treatment in our patients is negligible. Changes in hematological parameters are observed under cross-gender hormone therapy. With the cross-gender hormone regimen performed by us it is possible to generate less side effects in the treatment of transsexual patients than described before.