Anti-Müllerian hormone in women with hypopituitarism diagnosed before or during adolescence.

In women, anti-Müllerian hormone (AMH) is exclusively expressed in granulosa cells and an established marker of ovarian reserve. In menstrual cycle disorders, low AMH is usually interpreted as an indicator of primary ovarian insufficiency. This study is a case series of 11 patients with hypopituitarism. AMH concentrations were on or below the age-specific 25th percentile in three of the four patients diagnosed in infancy, but not in the remaining seven patients, who were diagnosed during adolescence or later. In patients with hypopituitarism, the detection of low AMH serum concentrations can present a diagnostic pitfall and its value in the interpretation of ovarian reserve in these patients is challenging.