The main reasons for miscarriage of a fertilized egg in the absence of a bed include the following: 1, congenital abnormalities of uterine development, especially when there is a childish uterus, stumpy uterus, saddle uterus and other uterine malformations, can cause miscarriage. 2, endometrial dysplasia, even if the formation of a fertilized egg is difficult to bed on the endometrial lining, which can also cause the symptoms of miscarriage. 3, abnormalities of the fertilized egg, in the case of chromosomal abnormalities in both partners, the development of fertilized eggs will also be affected. 3, fertilized egg abnormalities, in the case of chromosomal abnormalities in both husband and wife, the development of the fertilized egg will be affected to a certain extent, can also cause miscarriage. 4, in the pregnant woman is mentally stimulated, suffered a great deal of work pressure as well as psychological pressure, can also be caused by the performance of the fertilized egg miscarriage. Because of the different causes of fertilization abortion, the use of the treatment program is not exactly the same, the need for patients to go to the hospital in a timely manner for diagnosis and treatment of the disease.