The postpartum period may be a particular window of vulnerability for eating disorder symptoms given changes to body shape and weight that women experience. However, no quantitative studies have identified risk factors for postpartum eating disorder symptoms, and current psychosocial frameworks of risk may be missing key elements unique to this period. This manuscript reviews existing quantitative and qualitative literature regarding the developmental trajectory of eating disorder symptoms during the perinatal period and proposes an application of three psychosocial models of eating disorder risk (objectification theory, the tripartite influence model of body image and eating disturbances, and social comparison theory) to the postpartum period. Drawing on quantitative and qualitative literature, this paper identifies novel postpartum-specific factors that should be included for consideration in psychosocial models (e.g., self-oriented body comparison and pressure to achieve a prepregnancy weight and shape). This review is the first to theorize potential postpartum-specific risk factors for postpartum eating disorder symptoms. Prior models of eating disorder risk omit key psychosocial factors that are unique to the postpartum period. Other limitations of prior research relate to measurement and methodology. This critical window of vulnerability has been largely ignored in the quantitative literature and necessitates further research.