Macroscopic deciduosis in pregnancy is finally a common entity

Abstract Objective The primary aim of our study was to determine the prevalence of macroscopic deciduosis Found randomly in Cesarean sections and the secondary objective to determine the association with any obstetrical complications or adverse effects. Methods This is a unicenter prospective study from 01/08/2011 to 01/02/2014. During the study period 307 consecutive Cesarean sections were performed with 31 biopsy proven cases of macroscopic deciduosis in the ovary, uterine and fallopian tube serosa. Results The mean age of the patients was 31.2 ± 5.4 years (range 13–43), the mean Body Mass Index was 26.3 ± 5.8 (range 15–48) kg/m2 , the mean term of Cesarean was 270 ± 25 days, and the mean fetal weight was 3094 ± 809 g. The majority of patients were Caucasian ( n = 175, 57.0%). Patients with deciduosis had a greater BMI (28.4 ± 5.3 kg/m2 vs 25.7 ± 5.8 kg/m2 , p < 0.05). The presence of pain was more frequent in the deciduosis group (10.1%, OR 5.78, 95%, CI [2.41–13.87], p < 0.001). Conclusion Deciduosis is a benign lesion during pregnancy that is not correlated with obstetrical complications. Our study has shown that this physiological phenomenon is more frequent that originally thought, being present in 10% of the Cesarean sections, and is associated with abdominal pain during pregnancy.