Ovarian Histology of Removed Ovaries After Gender-Affirming Testosterone Therapy.

. Assigned female at birth transgender people go through a gender-affirming hormone therapy using testosterone. We aimed to define the histological changes in the removed ovaries of these patients and investigate the correlation of these changes to factors like chronological age and duration of hormone therapy. . The ovaries of 84 patients who had at least 6 months of testosterone therapy before surgery were examined. Tunica albuginea thickness, cortical thickness, and number of different stages of follicles were recorded. . The mean age was 27.2 ± 4.9 years. Testosterone duration 25.8 ± 13.1 months. The mean tunica albuginea thickness was 356.4 ± 152.6 µm. The mean cortical thickness was 799.6 ± 245.6 µm. The number of primordial (C1) follicles was 18.03 ± 13.6 and antral (C3) follicles was 3.1 ± 1.9 per cm². When grouped as using therapy under or over 2 years the groups did not have differences in histological findings. Hormone duration did not correlate with histological findings except for a positive correlation with atretic follicle number. However, age was negatively correlated with number of follicles at all stages except atretic follicles and positively correlated with cortical thickness ( < .05). . Testosterone therapy induces multifollicularity, stromal hyperplasia, and luteinization in some patients. Hormone duration did not correlate with ovarian histology whereas chronological age did suggesting an effect of age on ovarian reserve rather than duration of hormone therapy.