Background: Bilateral ovarian luteinized follicular cysts are rarely described, not to mention full-term natural labour without cystectomy beforehand. One case will be presented in this report. Case Report: A 29-year-old woman had pelvic masses detected at 12 weeks of pregnancy. The main concerns were the safety of pregnancy, conservative management, and close review. She was admitted to the hospital again 30 days after childbirth. Ultrasound examination was performed as well as CT, which showed that there was multilocular cystic low density in abdomen without calcification. She accepted bilateral ovarian cystectomy and reconstruction. Postoperative pathological results led to the diagnosis of bilateral ovarian luteinized follicular cysts. Conclusion: CT imaging feature combined with medical history, hCG level or other imaging modality can be used for diagnosing it initially. The case we report will provide useful experience for the diagnosis of ovarian luteinized follicular cyst.