Background: Decidual polyps are protruding nodules of ectopic deciduosis of endocervical stroma that occur during pregnancy. They are benign changes, associated with recurrent vaginal bleeding and infections, which can result in miscarriage, preterm premature rupture of membranes (PPROM), premature labor and/or delivery. There are no strict treatment guidelines for decidual polyps during pregnancy. Case: This paper describes a case of recurring symptomatic decidual polyp in each of the three pregnancies of a woman treated in our clinic for primary infertility. During the first and second pregnancy, we opted for polypectomy and conservative treatment, respectively. In both cases this led to loss of the fetus. During the patient’s third pregnancy we performed polypectomy and closely monitored both the patient and the fetus; she delivered a healthy baby in the 38th week of gestation. Conclusions: Due to the lack of clear guidelines, we maintain that frequent checkups, urethral swabs and polypectomy during the first trimester will lead to a positive outcome, i.e., delivery of a healthy baby by a healthy mother.