During pregnancy, especially in the first 3 months of pregnancy, the development of the fetus is unstable and is prone to miscarriage with early onset or complete miscarriage, and sometimes the doctor will recommend bed rest to preserve the fetus. The exact duration of bed rest will depend on the fertility preservation treatment. During the period, the pregnant woman needs to stay in bed for at least 7-14 days, and during this period, she should follow the doctor’s advice to take appropriate medication and other measures to preserve the fetus. If the symptoms of preterm labor disappear and the fertility preservation treatment is successful, the pregnant woman can get out of bed and move around appropriately, but she should not overwork or do strenuous exercise. However, if the symptoms of preterm labor or preterm labor do not completely disappear after 1 week of fertility preservation treatment, the effect of fertility preservation treatment is not good, and recurrent vaginal bleeding occurs, it is usually necessary to stay in bed for 1 month or even longer. Bed rest is the most common measure in fetal preservation, pregnant women can follow the doctor’s instructions to carry out appropriate activities in bed, such as changing lying down position, sitting up and resting. In addition, pregnant women should strictly prohibit sexual intercourse, reduce unnecessary vaginal examinations, maintain emotional stability, ensure that the rest environment is quiet, supplement high-protein, high-vitamin and high-calorie foods, and take the appropriate amount of vitamin E orally as prescribed by the doctor.