Safety and Efficacy of Contraceptive Methods for Obese and Overweight Women.

Increasing rates of obesity have become a major public health challenge. Given the added health risks that obese women have during pregnancy, preventing unwanted pregnancy is imperative. Clinicians who provide contraception must understand the efficacy, risks, and the weight changes associated with various contraceptive methods. Despite differences in the pharmacokinetics and pharmacodynamics of hormonal contraceptives in overweight and obese women, efficacy does not appear to be severely impacted. Both estrogen-containing contraceptives and obesity increase the risk of venous thromboembolism, but the absolute risk remains acceptably low in reproductive age women.