Foetal preservation is a therapeutic measure that needs to be taken when a pregnant woman suffers from preterm miscarriage, as well as when she is obviously unwell, so that the fetus can continue to carry on with the pregnancy. Clinically, a spontaneous abortion occurs when the embryo fails to continue to develop normally within 28 weeks of gestation. This type of patient needs to be treated with fertility preservation therapy to increase the chances of the fetus continuing the pregnancy. In general, women in the early stages of pregnancy, due to insufficient corpus luteum secretion, the placenta is not yet mature, there is a greater chance of pre-eclampsia, so early pregnant women need to preserve the fetus is more likely. If a pregnant woman experiences abnormal vaginal bleeding, abdominal pain, nausea, fatigue, headache and other discomforts during pregnancy, she needs to go to a regular hospital, and at the same time, ensure sufficient rest time. If the ultrasound examination reveals that the embryo is alive and well, she can continue the pregnancy, and she can take dextroprogesterone orally or intramuscularly under the guidance of the doctor, so as to increase the chances of the embryo’s survival. In addition, pregnant women should take regular pregnancy tests during pregnancy and seek medical attention if they experience any discomfort.