This chapter addresses the management of weight related to three phases of a woman’s reproductive years – precon­ception, during pregnancy and postpartum – for adult wom­en with obesity. Although these reproductive periods are addressed separately, it is important to consider that these phases represent the continuum of weight management over the reproductive years in women with obesity. During these time periods, women frequently access the healthcare system, thus providing clinicians with health promotion opportunities which may have positive impacts on the short- and long-term health of both the woman and her children. Discussion of the obstetric and anesthetic management for women with obesity during pregnancy is beyond the scope of this clinical practice guideline.