The main cause of fetal arrest is the embryo’s chromosomal abnormality, followed by the presence of certain adverse factors in the woman’s body, chromosomal abnormalities in the man’s side, environmental radiation and other causes of fetal arrest. I, embryonic factors: embryonic chromosomal abnormalities are the main cause of fetal arrest, accounting for more than half of the proportion of fetal arrest, usually the embryo in the process of division spontaneous stop development, may be related to the number of chromosomal abnormalities, such as 21-trisomy, 18-trisomy syndrome, etc. Female factors: 1) female systemic factors: such as severe infection, severe anemia, heart failure, chronic liver and kidney disease, hypertension, etc., may cause fetal arrest; 2) female genital factors: such as uterine malformation, uterine fibroids, uterine adhesions, severe trauma to the uterus, etc., may cause fetal arrest because the pregnancy environment cannot be maintained; 3) female endocrine factors: such as hypothyroidism, diabetes mellitus, abnormal sex hormone levels, etc., may also cause fetal arrest. 4, female immune factors: such as lupus erythematosus and other autoimmune abnormalities, which may cause immune attack and damage the embryo and cause abortion; 5, other: such as strong trauma, such as car accidents, too frequent sexual intercourse, etc. may cause abortion; serious mental trauma, anxiety, fear, sadness and other emotions may cause abortion; some bad habits, such as excessive smoking The first thing you need to do is to take drugs without medical advice, and this can also cause abortion. The male factor: from the male side of the chromosome if there is an abnormality, or fertilization sperm deformity, can cause abortion. Environmental factors: such as excessive exposure to radiation during pregnancy, heavy metals such as lead and arsenic, heavy exposure to toxic substances such as pesticides, excessive levels of formaldehyde, ethylene oxide and other chemicals in the living environment, can cause fetal arrest. Because of the many factors involved in fetal arrest, the couple can actively undergo pre-conception checkups before pregnancy to understand their personal health conditions and whether they can meet the conditions for conception, and purposefully carry out life conditioning, such as improving diet and living habits. If pregnant, pregnant women should pay attention to avoid contact with toxic and harmful substances on a daily basis and go to the hospital for regular maternity checkups during pregnancy to avoid discomfort symptoms affecting the development of the fetus. After a fetal abortion, please seek medical advice to terminate the pregnancy, and make appropriate psychological adjustment to avoid excessive stress, sadness and other adverse emotions interfering with daily life, and after the body recovers, you can usually get pregnant again.