Ovarian Cysts in Pregnancy
Ovarian cysts are diagnosed in approximately 1 in 1,000 pregnancies , with the majority discovered during first-trimester ultrasound examinations. While most are benign functional cysts that resolve spontaneously, approximately 2-5% will require intervention due to complications such as torsion, rupture, or malignant transformation. The physiologic changes of pregnancy—including increased vascularity, uterine enlargement, and ligamentous laxity—create unique diagnostic and therapeutic challenges. Classification and Clinical Significance Functional Cysts 1. Follicular Cysts Develop when a dominant follicle fails to ovulate or regress Typically 2-5 cm, unilocular, and anechoic on ultrasound Most resolve by 1 6 weeks gestation as hCG levels decline 2. Corpus Luteum Cysts Present in 100% of early pregnancies (physiologic) Average size 3 cm (range 1-11 cm) Critical for progesterone production until 10-12 weeks May hemorrhage but rarely rupture (<1% of cases) Pathologi...