Purpose: To investigate the placental cysts in every aspect and evaluate associations with fetal anomalies, fetal growth, accompanying maternal diseases, and obstetric outcomes. Methods: The presented cohort study was conducted with twenty pregnant women diagnosed with placental cysts. Maternal age, obstetrical histories, maternal diseases, ultrasonographic characteristics of cysts, additional ultrasound findings, and fetal anomalies were recorded at the time of diagnosis and each examination. Pregnancy outcomes; birth weight, gestational age at birth, APGAR scores, NICU admissions, amniotic fluid disorders, and fetal growth restriction (FGR) were recorded for all participants. Data were evaluated according to diagnosis time, cyst size at the diagnosis time, delivery time cyst size, fetal anomalies, and obstetric outcomes. Results: All cysts were single. Five of them increased in size with follow-ups. The mean follow-up duration was 12 weeks. There were 9 FGR (64.3%). Six of the FGR patients had cyst sizes >5cm. There were eight fetal anomalies; 5 were heart-associated, and 3 had a single umbilical artery. The frequency of C/S in delivered patients was 78%, and preterm delivery was 35.7%. Conclusion: The presented study showed that placental cysts have clinical importance due to their potential risk for FGR and accompanying fetal anomalies. Appropriate patient follow-ups for cyst size enlargements and anomaly screening, especially for cardiac evaluation, might be important for placental cyst management. Also, uterine artery doppler measurements and prophylactic acetylsalicylic acid use might be under consideration. However, the clinical utility of uterine doppler examination and prophylactic use of acetylsalicylic acid needs further studies.