Male infertility patients to the hospital, the doctor will carry out three aspects of the examination: First, the process of asking the patient’s medical history, in the process of asking the patient’s medical history can learn about the patient’s past fertility, so that the history of female fertilization, to understand the patient’s sexual frequency, sexual function is normal, whether the normal ejaculation and so on. Secondly, a comprehensive and detailed physical examination is needed to check the external genitalia of the patient, such as penis, testicles, epididymis, vas deferens and other parts that can be detected through physical examination, whether there are abnormal manifestations. Third, laboratory examination, on the basis of the above examination, comprehensive and detailed semen analysis can be carried out, which can understand the concentration, vitality, motility, morphology of spermatozoa as well as the functionality of spermatozoa and the biochemistry of seminal plasma of the patient. Through the medical history, physical and laboratory reports, the doctor can make a preliminary diagnosis and analysis of the patient’s infertility.