Menstruation is a unique physiological change of women, which not only maintains women's characteristics and reproductive function, but also often affects the bleeding and coagulation mechanism of human blood. According to research, during menstruation, platelets will undergo great changes, often falling on the first day of menstruation, and returning to the original number on the third or fourth day.

During menstruation, human endometrium can release more tissue-activating substances, which can activate plasminogen in blood into anticoagulant plasmin, thus increasing the bleeding tendency of human body. So during the menstrual period, surgery may cause more bleeding. Moreover, due to endocrine disorders, women in this period are more prone to physical fatigue, pain and mood swings than usual, and their resistance to pathogenic bacteria is significantly lower than that of normal people. They hardly have surgery during the holidays, which not only has poor psychological tolerance for surgery, but also has poor anti-infection ability, leading to serious infection.

According to clinical observation, if the operation can be carried out about 5 days after menstruation to 10 days (that is, a period of time between menstruation), it is not only safe, but also less bleeding and complications such as infection.