Low menstrual flow can affect fertility because the causes of low menstrual flow usually affect pregnancy, for example, patients with low menstrual flow due to hyperthyroidism or polycystic ovary syndrome, ovarian hypogonadism, etc., which affect ovulation, so it is usually more difficult for patients to conceive. Even if the patient is able to conceive normally, there is a higher chance of stillbirth, preterm labor, gestational diabetes, high blood pressure and other adverse outcomes after pregnancy. If the patient’s low menstrual flow is caused by endometrial damage and endometrial adhesions, the endometrium’s tolerance will be reduced, so it will affect the fertilized egg’s implantation, and the patient is prone to biochemical pregnancies or the possibility of embryonic arrest and miscarriage.