OBJECTIVES To determine the prevalence of gestational ovarian cyst form in the early pregnancy or during first trimester that may contribute to the formation of ovarian cyst in pregnancy. METHODOLOGY Data collected through patient’s demographic history and questionnaire. For each case the patient’s ultrasound images were evaluated to determine the type of cyst, ultrasound appearance, with their rates and location. RESULTS Out of 111 patients were included in the study, the total incidence of ovarian cyst (Corpus luteum) in pregnancy were 1.8%. The ovarian cyst through analysis was found in patients whose gestational age was in the range of first trimester to second trimester. Other 109 (98.1%) Patients with family history of ovarian cyst, Diabetes, Induction therapy and Obesity found no cystic lesion. Patients included in this study were between the age of 18-48 Years CONCLUSION The outcome of this study has shown that prevalence of ovarian cyst in pregnancy is very less because ovarian cyst that form in the first trimester usually resolve itself without given any medication or resection treatment. Obstetric ultrasound has been found to be accurate in figuring out simple, solid, and complex type of cyst in pregnancy.