Searchable abstracts of presentations at key conferences in endocrinology

ea0064021 | Characterisation of testicular function and spermatogenesis in transgender women | BES2019

Characterisation of testicular function and spermatogenesis in transgender women

Vereecke G , Defreyne J , Collet S , Van Saen D , Goossens E , T'Sjoen G

Introduction: If desired, options for gender affirming treatment in transgender individuals may involve gender affirming hormonal therapy. However, the effects on fertility and testicular function are less known. Several studies have been performed with variable results regarding germ cell maturation and testicular function in this population. In order to give correct information to all transgender women, we find it important as a referral center for transgender care, to compa...

ea0064011 | Effect of exogenous testosterone administration on serum oestradiol levels in assigned female at birth transgender people: result from a large transgender cohort | BES2019

Effect of exogenous testosterone administration on serum oestradiol levels in assigned female at birth transgender people: result from a large transgender cohort.

Defreyne J , Aers XP , Collet S , Wiepjes CM , Fisher AD , Schreiner T , Den Heijer M , Kaufman JM , T'Sjoen G

Aim: The changes in serum oestradiol levels in assigned female at birth (AFAB) transgender people receiving testosterone therapy have not been elucidated. How serum oestradiol levels change after initiation of testosterone therapy, if these levels should be monitored and whether altered oestradiol levels will result in adverse health outcomes, remains unclear.Methods: This prospective cohort study was part of the European Network for the Investigation of...

ea0057013 | No correlation between serum testosterone levels and aggression or anger intensity in transgender people: results from five European Centres | BES2018

No correlation between serum testosterone levels and aggression or anger intensity in transgender people: Results from five European Centres

Defreyne J , Arcelus J , Bouman W , Brewin N , Elaut E , Kreukels B , Heylens G , Den Heijer M , T'Sjoen G

Aim: Anger is a state of emotions ranging from irritation to intense rage. Aggression is the externalization of anger through destructive/punitive behaviour. The World Professional Association for Transgender Health (WPATH) Standards of Care, Edition 7 (SOC7) guidelines warn about aggression in transgender men (TM) on testosterone treatment. We aimed to assess whether aggression and anger intensity increase in TM and decrease in transgender women (TW) after initiation of gende...

ea0071010 | Vaginal bleeding and spotting in transgender men after initiation of testosterone therapy: A prospective cohort study (ENIGI) | BES2020

Vaginal bleeding and spotting in transgender men after initiation of testosterone therapy: A prospective cohort study (ENIGI)

J Defreyne , Y Vanwonterghem , S Collet , S Iwamoto , CM Wiepjes , AD Fisher , T Schreiner , M Den Heijer , G T'Sjoen

Background: Previous cross-sectional studies have described amenorrhea in cohorts of transgender men on intramuscular or subcutaneous testosterone injections. It remains uncertain which testosterone preparations most effectively suppress vaginal bleeding and when amenorrhea occurs after testosterone initiation.Aim: To investigate the clinical effects of various testosterone preparations on vaginal bleeding and spotting in transgender men.<p class="ab...