The absence of fetal heartbeat can be caused by a variety of factors such as embryonic abnormalities, maternal factors, and environmental factors. Fetal factors refer to chromosomal abnormalities or malformations in the fetus, which can lead to the absence of fetal heart. Maternal factors such as high blood pressure, chronic liver and kidney disease, chronic wasting disease, serious infection, uncontrolled diabetes and other serious systemic diseases, endocrine dysfunction, luteal insufficiency, polycystic ovary syndrome, thyroid dysfunction and other endocrine abnormalities, can lead to fetal failure, that is, the body is not suitable for pregnancy at this time, and need to be treated for the original disease first. Environmental factors such as excessive exposure to chemicals, arsenic, lead, formaldehyde, etc., exposure to radiation, high temperature, high noise environment, etc. may also lead to the disappearance of the embryo fetal heart. Fetal arrest occurs, if necessary, timely medical treatment for standardized diagnosis and treatment.