Embryonic abortion can occur without symptoms of abdominal pain. If a woman is pregnant, she should go to the hospital in time for check-ups, ultrasound examination to understand the size of the gestational sac and the situation of implantation, blood HCG examination, estradiol examination and progesterone examination. In the process of fetal preservation, it is necessary to go to the hospital every 7-10 days on average, to perform ultrasound, progesterone and blood HCG tests and other eugenic tests, and to decide the dosage and duration of progesterone for fetal preservation according to the progesterone value or blood HCG value, generally speaking, the preservation of fetus until about 13 weeks is relatively stable, and the possibility of embryo abortion is relatively small.