After the third trimester of pregnancy, the luteal cysts will gradually absorb and disappear on their own. In early pregnancy, luteal cysts do not affect fetal growth and development, but they do need to be observed. If a large luteal cyst ruptures and bleeds, pelvic emergency abdomen may occur, and in serious cases, it may lead to preterm miscarriage. After the third trimester, the placenta of the fetus has formed and it secretes progesterone to maintain the normal course of pregnancy, and the corpus luteum of the ovary no longer secretes progesterone, so the corpus luteum cysts of the ovary will gradually disappear on its own. During pregnancy, women should pay attention to proper rest and ensure that they are relaxed and have a good healthy state of mind, which is also conducive to the growth and development of the fetus.