Pregnancy without fetal heartbeat may be caused by short pregnancy, embryonic dysplasia, embryonic abortion, the specific causes and treatments are as follows: 1, short pregnancy: some pregnant women have irregular menstruation and delayed ovulation, that is, it is possible that the fetal heartbeat cannot be seen at 6-7 weeks of pregnancy. It is recommended to review the ultrasound at an interval of 7-10 days, if the growth of the sac is normal and there is fetal heartbeat, it is normal and no treatment is needed; 2, fetal dysplasia: if the pregnant woman suffers from serious systemic diseases, such as hypertension, chronic liver and kidney disease, chronic wasting disease, serious infection, severe anemia, heart failure, thrombophilia, etc., or endocrine function abnormalities, luteal insufficiency, polycystic ovary The factors such as abnormal endocrine function, luteal insufficiency, polycystic ovary syndrome, hyperprolactinemia and abnormal thyroid function can lead to abnormal internal environment, which can affect fetal development. In addition, male sperm abnormalities, excessive smoking, and alcohol addiction cause chromosomal abnormalities in the fetus, which may also cause the embryo to fail to develop normally. If there is fetal dysplasia, you should promptly go to the hospital for laboratory tests of progesterone, HCG and estrogen to assist in determining whether to terminate the pregnancy; 3. Embryonic abortion: If the fetus has chromosomal abnormalities, abnormal organ development, or has genetics, infection, drugs and other factors, it may also lead to the occurrence of embryonic abortion. In addition, it may also be caused by excessive exposure of pregnant women to chemical substances such as arsenic and lead, exposure to radiation or excessive stay in high temperature and high noise environment. Once the diagnosis of embryonic abortion is confirmed, an abortion is needed to terminate the pregnancy.