Luteal cysts are physiological cysts, often found during physical examinations, usually less than 3 cm in diameter, are normal for the body, and will become smaller or disappear after menstruation. Luteal cysts have the risk of rupture and should also be given high priority. When it comes to luteal cysts, it is important to first understand clearly what the corpus luteum is. The corpus luteum is formed after ovulation of a mature follicle. In the normal state, the corpus luteum is 2 to 3 cm in diameter and is a cystic corpus luteum; when the cystic corpus luteum persists, the fluid in the cystic cavity increases and the diameter exceeds 3 cm or more, it is an ovarian corpus luteum cyst. Luteinizing cysts are commonly found in women of childbearing age. Luteinizing cysts may rupture due to external forces (like atrium) and may suddenly cause pain in the lower abdomen, nausea and vomiting, frequent urination and defecation, etc. In more serious cases, dry mouth, dizziness and palpitations, fainting, etc. may even occur. If hemorrhagic shock is manifested, surgical treatment should be performed. Women with menstrual disorders and long menstrual cycles are prone to the formation of luteal cysts. In addition, the ovaries will physiologically enlarge during pregnancy to form luteal cysts, but if ultrasound reveals luteal cysts with abnormal enlargement of the ovaries bilaterally, attention should be paid to exclude the possibility of trophoblastic disease. With the end of pregnancy, the corpus luteum cysts will also disappear. For luteal cysts, which are physiological cysts, no special treatment is usually needed and observation is sufficient.