Just make sure you are comfortable and lie flat or on your side during your preeclampsia birth control. Pre-eclampsia refers to symptoms such as irregular vaginal bleeding as well as abdominal pain before the 28th week of pregnancy. In early pregnancy, as long as you are comfortable, lying flat or on your side is fine. In mid-pregnancy, pregnant women can lie flat or on their side, but it is not recommended to stay in one position for a long time. During the period of fetal preservation, you need to pay attention to the observation of abdominal pain and vaginal bleeding, regular ultrasound examination, timely understanding of the fetal situation, clear follow-up treatment plan. During pregnancy, the blood is in a state of high coagulation, prone to the formation of blood clots, which may cause double lower limb thrombosis or pulmonary embolism. It is recommended that pregnant women with preterm miscarriage should turn over properly or get out of bed according to the situation.