(Reuters)—The U.S. Food and Drug Administration says it has approved Amgen’s osteoporosis treatment for postmenopausal women who are at high risk of fracture. Evenity (romosozumab-aqqg), developed jointly with Belgium-based UCB SA, helps reduce the risk of fracture by increasing bone mass and mildly inhibiting the break down of bone minerals. Romosozumab-aqqg belongs to a new…