After the fetal arrest generally need to clear the uterus within two weeks, small gestational weeks without abnormalities can be directly clear the uterus, while large gestational weeks can not be directly clear the uterus, the specific time and gestational weeks related. 1. small gestational week: if the gestational week is small, then clinically b ultrasound or combined with blood test indicators to confirm fetal arrest, no fever and vaginal inflammation and other acute or subacute infections, can be timely and directly for the removal of the uterus surgery. In order to avoid too long an interval caused by retained abortion, which will increase the risk of infection, easy to cause damage to the mother, and even cause maternal coagulation dysfunction. 2. Large gestational weeks: If the gestational weeks are large, the fetus has been formed, the placenta has also grown out, at this time it is not possible to directly carry out the removal of the uterus, but you need to take medication, to be discharged from the fetus and the placenta, and then carry out the removal of the uterus surgery, so that the uterus cavity residual tissue is completely removed. If the uterus is cleared directly, it is easy to lead to uterine hemorrhage, incomplete abortion and so on. It is recommended to consult a doctor in time after the fetal arrest and choose the appropriate time for removal of the uterus under the doctor’s guidance.