Guidelines for the screening and evaluation of overweight and obesity have been published by a number of organizations including the National Heart, Lung, and Blood Institute (NHLBI) [4], the World Health Organization (WHO) [8], and the United States Preventive Services Task Force [2, 5, 9] (Table 13.2). NHLBI [10] recommends screening adults for obesity with BMI and waist circumference and risk factor assessment. Subsequent intervention is then based upon overall risk assessment [4]. The United States Preventive Services Task Force (USPSTF) recommends that clinicians screen all adult patients for obesity and offer intensive counseling and behavioral interventions to promote sustained weight loss for obese (BMI >30 kg/m²) adults. The Canadian Task Force on Preventive Health Care recommends measuring BMI and waist circumference in all adults. The American College of Obstetricians and Gynecologists recommends measuring BMI in all adult women as part of routine gynecologic and well woman visits [3]. Overweight or obese women should then be counseled about the healthy eating and increasing physical activity.