If a woman has a fetal heartbeat and fetal buds appear on an ultrasound after pregnancy, but when the ultrasound is repeated, the embryo is found to have stopped developing, this is called embryonic abortion. There are many causes of embryonic abortion, including abnormalities in the quality of the embryo itself, such as sperm abnormalities or poor quality of the follicles, which are the most common causes. It can also occur when there is HPV infection, or mycoplasma or chlamydia infection. Rubella virus, cytomegalovirus, or herpes virus infections can cause embryonic abortion. If the embryo stops developing, the woman should consider terminating the pregnancy as soon as possible and then prepare for another pregnancy. For women with recurrent embryonic arrest, it is often recommended that the dead embryos be sent for medical examination to see if there are chromosomal abnormalities, and that comprehensive preconception tests such as coagulation, thyroid function, TORCH and infertility antibodies, as well as tests for HPV and mycoplasma infections, be done before conceiving again. For women with abnormal coagulation function, it may also cause embryonic abortion, so such women may need to consider intramuscular heparin for fetal preservation to prevent embryonic abortion again after pregnancy.