Xie, 30, married for two years without contraception, and his wife was not pregnant. Later, he went to the hospital for examination and found that he was a patient with oligospermia, and his wife did not detect abnormalities. Assisted reproduction was carried out at the suggestion of the doctor and the pregnancy was successful, but the embryo was stopped at the 5th week of pregnancy. Then he went to the hospital for genetic counseling, and the doctor suggested Xie to have a sperm DFI test. The results showed that the DFI of the period was as high as 50%. Xie carried out vitamin E antioxidant treatment at the suggestion of the doctor. Three months later, Xie went to the test of DFI again, and its DFI value fell to 12%. After assisted reproduction again, the wife successfully got pregnant and gave birth to a healthy baby.