Hospitalization for birth control is not always possible and is mainly related to the condition. There are many cases that require hospitalization, and according to the different weeks of pregnancy, they can be divided into early preterm miscarriage, late preterm miscarriage in mid-pregnancy, and preterm preterm miscarriage in late pregnancy. 1. Early preterm miscarriage: Luteal insufficiency, thyroid dysfunction, etc. can lead to early signs of miscarriage, such diseases in the supplementation of the appropriate hormones, such as vaginal bleeding, abdominal pain and other symptoms of miscarriage gradually reduce, most of them can be preserved. 2. Late preeclampsia in the middle pregnancy: such as placenta hypoplasia, sexual stimulation, etc. can also lead to preeclampsia, after bed rest, appropriate anti-infection, inhibit contractions and other treatments, such as the symptoms improve, generally can be saved. If premature rupture of membranes occurs at an early gestational age, it is generally not easy to preserve, because the infection must be delivered as soon as possible, and it is difficult for a miscarried child of a small gestational age to survive. 3. Late preterm labor: If the membranes are intact, most of the fetus can be saved if the symptoms get better after giving contraction-suppressing and anti-infection treatments. If the membranes are ruptured, resulting in a high risk of infection, only appropriate prolongation of gestational weeks, the greater the gestational weeks, the higher the survival rate. If there is a need to preserve the fetus, it is necessary to follow the doctor’s advice in time.