Deferiprone is a progestin, and progesterone has a very important role in maintaining embryonic development. If the patient’s luteal function is insufficient or there are other reasons for low progesterone level, it may cause the patient to have abdominal pain, bleeding and other manifestations of preterm miscarriage, or to have adverse consequences such as stillbirth or habitual miscarriage. Therefore, after supplementing with dydrogesterone, the progesterone in the patient’s body can be raised, which can treat the abnormal development of embryo caused by the lack of progesterone. 2. Dydrogesterone can counteract estrogen, which can reduce the sensitivity of the uterus, and after reducing the sensitivity of the uterus, the chance of the patient having uterine contractions will be lower. .