The decision to treat women in the early postmenopausal period has come under scrutiny because of the low occurrence of fractures in this population and the possible lack of cost-effectiveness for individual patients. This article focuses on the potential use of bisphosphonates for the prevention and treatment of osteoporosis in the early postmenopausal period. Studies have determined that there is a relationship between bisphosphonate treatment and bone mineral density (BMD) gains, even in women in the early postmenopausal period without a diagnosis of osteoporosis. These patients receive benefit from treatment, including improvements in BMD levels and fracture protection. Using BMD scores, rates of bone turnover, and risk-based diagnostic criteria as part of the decision to initiate therapy may allow for the identification of an early postmenopausal patient population that would benefit from preventative therapy. This would improve the cost-effectiveness of using bisphosphonates for the prevention of osteoporosis in this population. The evaluation of women at risk for developing osteoporosis should include an assessment of both BMD scores and additional risk factors. Early postmenopausal women who are in a high-risk group should be considered candidates to receive bisphosphonate therapy.