Generally, intrauterine blood accumulation in early pregnancy requires fetal preservation for about 7-15 days, depending on the individual, mainly until the symptoms of pre-eclampsia miscarriage disappear. The main cause of intrauterine blood accumulation in early pregnancy is insufficient progesterone, which may be a sign of preterm miscarriage and therefore requires fetal preservation treatment. The main medications used for fetus preservation are progesterone preparations, both injectable and oral. If the blood accumulation in the uterus is small, it is usually sufficient to carry out fetal preservation treatment for about 7 days; if the blood accumulation in the uterus is large, it is necessary to carry out fetal preservation treatment for about 15 days; if the manifestation of preterm miscarriage is still present after 15 days, the fetal preservation treatment should be continued, and some patients may need fetal preservation treatment until after 12 weeks of pregnancy. After the symptoms of pre-eclampsia miscarriage appear, pregnant women need to pay attention to more rest, prohibit intercourse and tub bath, and do not eat foods that activate blood, cold and spicy stimulation.