A new study reveals post-menopausal women who have already been tested once for osteoporosis don't need a second test.<br />According to UPI, a second bone-density test doesn't improve physicians' ability to determine the risk for bone fractures in postmenopausal women.<br />The researchers say the first test is more predictive of fracture risk than a second test, suggesting the latter may be unnecessary.<br />The National Osteoporosis Foundation says a bone density test is the only test that can diagnose osteoporosis before a bone fracture occurs.<br />The foundation says people treated with prescription drugs for osteoporosis should undergo bone density testing every one to two years.<br />But based on current guidelines, those at lower risk for the condition can wait five years or more before being tested again.