LBODP089 Effects Of Low-dose Oral Micronised Progesterone On Sleep, Psychological Distress And Breast Development In Transgender Individuals Undergoing Feminising Hormone Therapy: A Prospective Controlled Study

Abstract Objective The role of micronised progesterone in hormone regimens for transgender individuals undergoing feminising hormone therapy remains uncertain. We aimed to determine the effect of oral micronised progesterone (progesterone) on sleep quality, psychological distress and breast development in transgender individuals undergoing feminising hormone therapy. Design: Prospective case-control study. Twenty-three transgender individuals on stable estradiol treatment newly commencing 100mg oral progesterone (n=23) and controls continuing standard care (n=19) were assessed over 3 months. Methods Pittsburgh Sleep Quality Index (PSQI), Kessler psychological distress scale (K10), and Tanner stage to assess breast development were assessed at 0 and 3 months. Non-parametric ANCOVA were used to compare differences between groups. Results Compared with controls over 3 months, there was no difference in PSQI (P=0.35), K10 (P=0.64) or Tanner stage (P=0.42). There was no significant difference in the proportion of individuals with clinically significant improvement in PSQI (25% vs. 22%, P=0.84). One individual had a significant deterioration in psychological distress that improved following cessation of progesterone. Conclusions Low-dose progesterone was not associated with changes in sleep quality, psychological distress, or breast development over three months follow-up, though there was significant inter-individual variability. Larger, placebo-controlled trials are required to further evaluate different doses of progesterone in feminising hormone therapy regimens. Presentation: No date and time listed