1 If two consecutive transfusions yield increments that do not meet the minimum standard for a successful transfusion (see Refractoriness below), the effectiveness of subsequent platelet transfusions should be evaluated by performing a count 10 to 60 minutes after their completion.
American College of Radiology: Starting at 40, get a mammogram every year. American College of Gynecology and Obstetrics: At 40 to 49, get a mammogram every year or every two years; at 50 and older, a mammogram every year. U.S. Preventive Services Task Force: At 50, get a mammogram every two years, ending at 75.
1 Women up to age 75 should have a mammogram every 1 to 2 years, depending on their risk factors, to check for breast cancer.  Experts do not agree on the benefits of having a mammogram for women age 75 and older. Some do not recommend having mammograms after this age. Others recommend mammography for women in good health. Talk to your provider about what is best for you.