People develop dissatisfaction with their physical appearance when there is a discrepancy between their current and ideal, desired body appearance. Pregnancy is a period in which great physical and psychological changes occur in a very short period. Although changes such as increased body weight and body volume are normal during this period, research has shown that it is extremely difficult for pregnant women to adjust to their new body weight and appearance, and they often become dissatisfied. What is worrying is that this dissatisfaction with one's own appearance has a negative impact on both the mother and the child. It often leads the mother into temptations of unhealthy behavior; not eating/strict diet or overeating because she seeks comfort in food. In view of all the above, the main goal of this research was to explore the risk factors of dissatisfaction with body appearance in the peripartal period. Pregnant women and mothers of infants up to 12 months (N=192) participated in the online survey. They completed the Almost Perfect Scale-Revised, the Physical Appearance Comparison Scale-Revised and the Body Areas Satisfaction Scale. It was shown that maladaptive perfectionism is not a significant predictor of dissatisfaction with physical appearance, while the tendency to compare physical appearance is the most significant predictor. Also, gestational weight gain was a significant predictor of dissatisfaction with body appearance for the group of mothers, but not for the group of pregnant women. This research helps in understanding the risk factors for the development of dissatisfaction with body appearance, it can be used as a guideline to provide protection and help to women who, in this sensitive period, have to deal with their own dissatisfaction and concerns about how they look.