Depo-Provera and Breast Cancer
Written by Faith Anderson on April 6, 2012
The Depo-Provera study reviewed the records of more than 1,000 women from Seattle between the ages of 20 and 44 who had been diagnosed with breast cancer, and compared them to more than 900 women who had not been diagnosed with breast cancer. The results indicated that women who used the Depo shot for a year or more were 2.2 times as likely to be diagnosed with invasive breast cancer.
Researchers suggested that the risk of breast cancer decreased the longer a woman was off the shot, which further supported the conclusion that the Depo shot was linked to breast cancer. They also noted that even with the increased risk, the chances of a breast cancer diagnosis in young women is low, and that the risk dissipated after use of the shot was discontinued. They said their findings emphasize how critical it is to identify the potential risks associated with specific forms of contraceptives and the importance of weighing methods of contraception and their risks against the alternatives.