Ovulation is calculated 14 days before the next menstrual period. During ovulation, some women may experience some uncomfortable symptoms, such as a small amount of vaginal bleeding, mild abdominal pain or back pain. When ovulation occurs, some women may experience discomfort or vague pain on one side of the lower abdomen, and individual women may have more intense abdominal pain, which may even radiate to the lumbosacral area or groin. The frequency of occurrence varies; frequent cases may occur for several months in a row, some may occur a few months out of the year, and some may occur only a few times in a lifetime. The cause of abdominal pain during ovulation may be related to the flow of follicular fluid into the pelvic cavity when the follicle ruptures, which irritates the pelvic peritoneum and causes the sensation of abdominal pain. Due to individual differences, the amount of follicular fluid is high in some people and low in others, thus causing different degrees of abdominal pain symptoms. It can be seen that abdominal pain during ovulation is a physiological phenomenon that does not affect health and does not cause infertility. If it occurs occasionally and the pain is mild, no treatment is necessary. If the abdominal pain is severe and affects life or work, painkillers can be applied. If it occurs frequently every menstrual cycle, oral short-acting contraceptives can be applied to inhibit ovulation and improve its symptoms.