The endometrium is thickened and inhomogeneous on ultrasound. Other infertile patients with thickened endometrium, heterogeneous or strong light spots found during ovulation promotion should be suspected of having endometrial polyps. Endometrial polyps protrude from the uterine cavity and can be solitary or multiple, soft and smooth in texture with varying length of the tip. Sometimes there are no symptoms. When the tip is long, it can protrude into the cervical canal. If the polyp is infected, symptoms of increased leucorrhea, lower abdominal cramps, or foul-smelling bloody discharge can occur. Common causes of polyp formation may be inflammation – endometritis, atopic infections such as tuberculosis, etc. It may also be caused by estrogen and progesterone imbalance, and related to high estrogen level. Clinical diagnosis depends mainly on ultrasound in addition to symptoms and signs. Once the presence of polyps is suspected, hysteroscopy should be performed, the polyps should be surgically removed, and scraping should be done and the tissue sent for pathology. After pathological confirmation of polyps, medications such as progestins can be used to adjust the menstrual cycle and prevent recurrence. For example, multiple endometrial polyps can prevent fertilization of the egg, and when combined with infection, they can also change the environment of the uterine cavity, which is not conducive to the survival of sperm and pregnant eggs. Therefore, it is important to review regularly after treatment of endometrial polyps to treat endometrial inflammation and to detect new recurrent lesions as early as possible to facilitate timely management.