The effects of asoprisnil on endometrial morphology in female cynomolgus monkeys (39-week toxicity study in adult cynomolgus monkeys). Photomicrographic comparison of glandular morphology in a control monkey during the secretory phase with an animal treated with asoprisnil at a dose of 20 mg/kg. Asoprisnil induced glandular atrophy. Magnification 20×. From  with permission from Elsevier.