There are several possible results of fetal arrest chorionic villus delivery, such as chromosomal abnormalities, genetic factors, immune factors and unknown causes. 1. Chromosomal abnormalities: the human body has 23 pairs of chromosomes, if some specific chromosomal abnormalities, that is, if both parents have chromosomal abnormalities, chromosomal abnormalities will occur, which will lead to the occurrence of fetal arrest. 2. Genetic factors: if the fetus occurs pure gene cover cover, or compound heterozygous gene mutation, it will lead to the fetus development is limited, and even cause the fetal termination. 3. Immune factors: including anti-endometrial antibodies, anti-phospholipid antibodies, closed antibodies and anti-sperm antibodies. 4. Unknown causes: not all causes of fetal arrest can be found, if it is impossible to find the cause, it will be attributed to unknown causes. If a pregnant woman discovers the condition of fetal arrest during examination, it is recommended that she should consult a doctor in time, and under the doctor’s guidance, complete the relevant examinations to clarify the cause of the disease and take corresponding treatment measures.