The time needed to heal from pre-eclampsia varies from person to person. If the pregnant woman is in good condition, the treatment of fetal preservation is effective and the symptoms may disappear in 1-3 days; if the symptoms are a little more severe, it may take 1-2 weeks; some pregnant women with special conditions may need fetal preservation until 28 weeks or even until delivery. If a pregnant woman has only mild vaginal bleeding and abdominal pain, and the ultrasound shows no abnormal development of the embryo, she can rest in bed and use progesterone preparation to keep the fetus. Generally, the vaginal bleeding and abdominal pain can be reduced to disappear within 1 week, after which the pregnant woman can observe the development of the fetus by regular maternity checkups. If the vaginal bleeding is heavy and persistent, and the abdominal pain gradually increases, it may indicate the unstable development of the embryo in the uterus, which requires absolute bed rest, treatment with hormonal drugs combined with vitamins and drugs to inhibit contractions, and if necessary, hyperbaric oxygen to assist in fetal preservation, the course of treatment may be prolonged, but usually it can be cured by 28 weeks. However, in special cases, vaginal bleeding may continue throughout the pregnancy, and the fetus needs to be kept on birth control, and regular checkups are needed to see if the fetus is slow or has stopped developing. After the onset of preterm miscarriage, pregnant women should receive treatment as soon as possible and should not use private medication to avoid delayed treatment or improper treatment that may lead to refractory miscarriage. In case of refractory miscarriage, the embryo may be completely detached from the uterine wall and the treatment of fetal preservation is ineffective, so the pregnant woman needs to terminate the pregnancy by abortion or induction of labor.