In the process of pregnancy, the general doctor will recommend a good pregnancy checkup, is in order to have a special situation in the process of pregnancy can be found at any time, generally in the early stages of pregnancy, if there is a phenomenon of embryonic arrest, there may be abdominal pain and vaginal bleeding phenomenon. In the mid-pregnancy, the development of the fetus stops, the first self-perception is that there is no movement of the fetus, it is necessary to go to the hospital in time to do a checkup, once diagnosed with embryonic arrest, must follow the medical advice to terminate the pregnancy, if the time is long, there is a possibility of coagulation dysfunction problems. When the pregnancy is confirmed, and there is bleeding in the lower abdomen, it may cause miscarriage or embryonic decontamination. If there is no bleeding or abdominal pain, this phenomenon generally does not occur in fetal arrest, you need to go to the hospital regularly to do ultrasound examination, oral folic acid tablets in early pregnancy to prevent fetal neural tube deformities, and to do regular prenatal checkups. The causes of fetal arrest are more, not only bleeding or abdominal pain, these two more obvious symptoms, there are also the following reasons: 1, genetic factors, if chromosomal abnormalities, genetic defects, common sperm or egg chromosomal abnormalities. 2, the basic secretion is insufficient, difficult to support the development of the embryo and cause death. 3, the uterine cavity deformities, so that the embryo can not grow. 4, the viral infection during pregnancy, the exposure to radioactive substances, toxic chemical substances, the embryo can not grow. Contact with radioactive substances, toxic chemical agents, taking drugs prohibited during pregnancy, high temperature, microwave, noise, excessive stimulation, etc.. All of the above situations may lead to fetal arrest.