Nutritional hypogonadotropic hypogonadism presented with decreased ejaculatory volume.

Abstract A 19-year-old male college student presented with decreased ejaculatory volume. Endocrinological examinations demonstrated a hypogonadotropic hypogonadism (HH) caused by a gonadotropin-releasing hormone deficiency from the hypothalamus. Cranial magnetic resonance imaging did not demonstrate any abnormalities. The possible causative factor of this adult-onset HH was excessive weight-loss (-26% in 1 year) due to inadequate food intake and an irregular lifestyle. Semen analyses and serum gonadotropin and testosterone values gradually improved as the patient became accustomed to his new life and regained weight.