Pregnancy bleeding and stomach pain is a symptom of preterm miscarriage. Whether the pregnancy can be successfully preserved depends on the results of the examination, such as ultrasound examination to understand the size of the gestational sac and the location of implantation, progesterone test, blood HCG test and estradiol test, and even thyrotropin test. If the progesterone test is low, progesterone is routinely given by intramuscular injection for fetal preservation, and low molecular heparin calcium can also be given by subcutaneous injection for fetal preservation. During the period of fetus preservation, it is necessary to abstain from intercourse and exercise, and give nutritious food routinely. 7-10 days after the medication, if the stomach pain disappears and vaginal bleeding stops, the condition of the gestational sac in the uterine cavity and the blood HCG and progesterone values will be checked again to see if the values are normal. If all indicators are normal, the chance of successful pregnancy preservation is generally higher.