According to statistics, the incidence of spontaneous abortion is as high as 24-28% in women who become pregnant with infertility treatment. This is because these women often have diseases of the uterus, as well as endocrine insufficiency of the ovaries. The uterus is the place where the embryo is deposited, grows and develops, and the early development of the embryo cannot occur without the support of the ovarian gestational corpus luteum and progesterone; if there is a malfunction in either of these two segments or if there are factors of immune infertility, the possibility of miscarriage after pregnancy can occur. For example, after longitudinal hysterectomy, after bicornuate uterus correction, after fibroid removal, after separation of uterine adhesions, after endometritis treatment, can be due to changes in the anatomical shape of the uterus or uterine endometrium of varying degrees of pathology, so that the uterine cavity and the endothelial lining can not meet the needs of the placenta’s growth and development, resulting in the death of the embryo withered and abortion. Another example is ovarian endocrine disorders, ovulation obstacles, polycystic ovaries, endometriosis after treatment of pregnant women, but still because of the ovarian corpus luteum function is insufficient, do not get a sufficient amount of progesterone, placenta function is reduced and lead to miscarriage. There are also some infertility treatment after pregnancy, such as the occurrence of mother-child blood type incompatibility, can also occur miscarriage.