To assess the connection of postpartum sexual dysfunction with mode of delivery, amenorrhea, depressive symptoms, and relationship satisfaction. For a prospective longitudinal study, we invited 729 Hungarian obstetrics patients to complete questionnaires at 3months (T1), 6months (T2), and 12months (T3) postpartum. We sent them the Female Sexual Function Index (FSFI), the Edinburgh Postnatal Depression Scale (EDPS), the Relationship Assessment Scale (RAS), and a self-constructed questionnaire for body mass index (BMI; calculated as weight in kilograms divided by the square of height in meters) and other data. Of the 389 who responded at T1, we selected 293 who met our criteria for age, obstetrical history, relationship history, completeness of response, and sexual activity. At T2 and T3, we selected 214 and 95. We analyzed their data by multivariate logit regression. The rates of sexual dysfunction were 44.70% (T1), 40.18% (T2), and 23.15% (T3). Mode of delivery was not a risk factor. Amenorrhea was a risk factor at T1 (P=0.012) and T2 (P=0.001). Obesity was a protective factor at T1 (P=0.021). The higher the EPDS score (T1: P<0.001; T2: P=0.035; T3: P=0.043), and the lower the RAS score (T1: P=0.016; T2: P=0.010; T3: P=0.032), the greater was the risk of dysfunction. Level of relationship satisfaction, severity of depressive symptoms, amenorrhea, and BMI are connected with sexual dysfunction within a year postpartum.