Fertility preservation should try to achieve bed rest most of the time, but it is not necessary to lie down all day. Usually insufficient function of the corpus luteum, uterine abnormalities and cervical insufficiency will cause the patient to have a preterm miscarriage, and if it is determined that the embryo is developing normally, then some birth control measures can be used. Commonly used birth control measures include rest and sedation, bed rest, prohibition of sexual intercourse, use of tranquilizers that are harmless to the fetus for those who are overly nervous; strengthening nutrition, and keeping the bowels clear. If the luteal function is insufficient, progesterone can be used to maintain the luteal function; or vitamin E antioxidant can be used to facilitate the development of the pregnant egg and so on. While resting in bed, the patient should be in a comfortable position, remain calm and not be emotionally agitated. If the patient is emotionally stable and has no other discomforts, she can walk around a little, but not make large movements. Remember that pregnant women should not exercise strenuously in any period of time, if pregnant women have special discomfort such as severe abdominal pain, it is recommended to consult a doctor in time. During pregnancy, pay attention to more rest, at the same time, should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.