Fetal arrest is a condition in which the development of the embryo stops in early pregnancy. ultrasound examination may reveal an irregularly shaped gestational bursa or fetus with no fetal heartbeat, or may show a withered gestational bursa. It is clinically classified as miscarriage or stillbirth. Some people think that fetal abortion is mainly due to female body, but in fact, many miscarriages and fetal abortions are related to male factors. The following is a specific explanation of the possible causative factors in men. 1, chromosomal problems A balanced chromosomal translocation in one of the spouses can easily lead to chromosomal abnormalities in the embryo thus causing embryonic abortion. The mechanism that leads to chromosomal abnormalities in embryos is that chromosomal fragments are easily lost or duplicated when the chromosomes of the couple are intermingled, resulting in chromosomal abnormalities in fertilized eggs that do not develop normally, which can lead to miscarriage, stillbirths, and malformed children. Sperm DNA integrity also correlates significantly with sperm function and can affect fertilized egg division as well as embryo development. Although a high rate of sperm DNA fragmentation may not affect egg fertilization, it may predispose to embryo failure and miscarriage. In other words, patients with severe sperm DNA damage may end up with miscarriage, even though the egg may be fertilized and divide normally. 2. Reproductive tract infection Early pregnancy miscarriage due to infection is receiving more and more attention from scholars at home and abroad. It has been found that after maternal infection, the pathogens can travel through the blood to infect the placenta, causing damage to the chorionic villi and capillary endothelium and destroying the placental barrier, which can lead to miscarriage, embryonic arrest and fetal malformation. Infections that occur in the mother may also originate in the male, such as infection and inflammation of the reproductive glands (epididymitis, orchitis, prostatitis or vesiculitis, etc.). 3, other causes From the male point of view, the presence of anti-sperm antibodies in the body, poor sperm quality, high malformation rate, the exposure of the lover to toxic substances before pregnancy, exposure to radiation or a lot of electromagnetic radiation, smoking or alcohol abuse, etc., may cause fetal abortion. The causes of fetal abortion are complex and difficult to treat. In case of fetal abortion, it is recommended that the male partner should also go to the hospital for formal examinations, such as semen quality tests, anti-sperm antibody tests, relevant enzyme tests, karyotype analysis, etc. The female partner also needs to undergo a detailed examination and then make the necessary treatment according to the results of both parties. It is not recommended to have another baby without any treatment for both partners after the occurrence of fetal abortion. At the same time, men should correct bad habits (smoking, drugs, alcohol and late nights, etc.), regulate work stress and improve sleep quality; avoid long-term exposure to harmful environments such as high temperatures, polluted air, toxins and radiation exposure. Then, under the guidance of a professional male physician, treat the relevant physical diseases in order to help succeed in having a healthy baby.