Two soldiers (10.5%) had monomeric hyperprolactinemia (without secondary hypogonadism), 1 (5.3%) had isolated ACTH deficiency, 2 (10.5%) had isolated GH deficiency, and 1 (5.3%) had combined ACTH, GH, and gonadotrophin deficiencies. The gene discussed is GH1; the disease is hyperprolactinemia.