For couples who have not taken contraceptive measures after marriage and are ready to have children, people who have not been pregnant for more than 1 year or more than 6 months (in the case of couples over 35 years old), they need to bring all the examination data, including previous semen routine, seminal plasma biochemistry, hormone examination, ultrasound, etc. Multiple comparisons before and after examinations are very helpful for the diagnosis of the disease. Special attention should be paid to the fact that the patient must be seen in person, and in the best case, both spouses should be seen together. The doctor needs to know in detail whether the patient has sperm in the past and whether the woman has a history of conception; to find out whether the patient has suffered from mumps, orchitis, epididymitis and other inflammatory diseases in the past, and whether he or she has often taken drugs such as cottonseed oil, which have a negative impact on the reproductive system. Patients should also have testicular palpation during the consultation, which is also very important for the diagnosis of the disease. The doctor needs to know the size of the testicles, whether the epididymis is full and what the hormone level is. It is also important to note that sperm vitality and density are affected by a variety of factors, so try to rest well within a month before the visit, avoid colds and fevers, and come to the clinic 3 to 7 days after the last ejaculation, so that the sperm test is most accurate, shorter than 3 days or longer than 7 days will affect the quality of semen.