Most of the cysts that appear on the right side during pregnancy are physiological corpus luteum cysts, which can generally shrink and disappear on their own after three months as long as they are less than 5 cm. However, some pregnant women have larger cysts that will gradually increase in size and will not disappear on their own, requiring timely treatment. Most of the cysts are benign physiological cysts with a diameter of 2-3 cm and rarely exceed 5 cm. most of them will gradually shrink after the third month of pregnancy until they disappear. However, during this period, pregnant women need to pay attention to follow up and review in order to know the changes of cysts. If the cyst tends to grow and exceeds 5 cm in diameter, it usually does not disappear on its own and requires attention. If the luteal cysts are increasing in size and pose a threat to the health of the pregnant woman and her fetus, appropriate treatment is required. Treatment methods are divided into conservative treatment and surgical treatment, if the patient conservative treatment effect is not good, then need to timely surgical treatment.