The present study was aimed to verify if body weight could influence self-perception, in terms of body image, mood states, dissatisfaction with physical appearance and risk of eating disorders. In particular, we evaluated the differences between women of normal weight vs. overweight and obese during the delicate phase of puerperium to verify if there were different emotional structures, linked to BMI. Thirty-two women, 16 normal-weight and 16 overweight or obese, belonging to the Department of Obstetrics and Gynaecology of the University Hospital, were individually interviewed. The Body Uneasiness Test (BUT), the Eating Disorder Inventory (EDI) and the Profile of Mood States (POMS) were used for the evaluation. Findings showed that the BMI in puerperium is significantly correlated to mood states and body perception. Furthermore, significant differences emerged in eating attitudes and behaviours, in specific aspects related to the weight gain phobia and the body shape perception, symptoms classically associated with the risk of developing an eating disorder.