The way to protect the fetus during pregnancy is to take care of rest, minimize all unnecessary activities, prohibit sexual intercourse and avoid constipation. This is the most fundamental treatment needed to preserve the fetus. If the symptoms of pre-eclampsia are more serious, it is necessary to add fetus preservation drugs, the common fetus preservation drugs in early pregnancy are generally progesterone and fetus preservation spirit, vitamin E and so on. In the second and third trimesters, you should pay attention to the lying position, the left side lying position, which can increase the blood flow of the placenta. Usually magnesium sulfate or ritodrine. All medications must be applied under the guidance of a doctor, not on your own, and you should also pay attention to avoid constipation and eat more fresh fruits and vegetables. If the symptoms of miscarriage are severe, it is necessary to hospitalize the fetus and review it regularly to ensure its success.