Some pregnant women may have preterm miscarriage due to less stable fetus, low progesterone in the body and bad hormone level in early pregnancy. In addition, the physical condition and mental condition of pregnant women are not good, which will also increase the risk of preterm miscarriage. If a pregnant woman needs to keep the fetus, the following points are recommended: 1. to maintain adequate rest and a good state of mind. 2. to use fetal preservation drugs, such as dextran, progesterone, and proprietary Chinese fetal preparations, etc. 3. if the symptoms of preterm miscarriage are serious, it is recommended that it is best to be hospitalized to keep the fetus, which can dynamically understand the development of the baby, and also through intravenous fluids and other methods to keep the fetus.