A 22-year-old woman presents with amenorrhea and galactorrhea. Her prolactin level is elevated at 95 μg/l and MRI reveals a small pituitary tumor. Prolactinomas are the most common cause of hyperprolactinemia and can lead to infertility and hypogonadism by disrupting the hypothalamic-pituitary-gonadal axis. Treatment options for microadenomas include dopamine agonists which can normalize prolactin levels and restore fertility.