What should check in male infertility? If you don't know which what to check, let's take an appearance! Determine what health background. It is important to collect medical history correctly. (1) occupation and job type; (2) past health background; (3) marriage and sexual life; (4) past examination and treatment; (5 ) genealogy and family history. 2. physical examination. Includes systemic and genital examinations. Laboratory inspection. In addition to the semen examination like a mandatory item, the remaining ought to be selected in line with the patient's specific conditions: (1) semen analysis. This will help to be aware of virility and is also a must-check for infertility. (2) In vitro xenogeneic insemination experiments can more accurately estimate sperm insemination ability, which can be of great value in judging male fertility. Endocrine examination. The function from the hypothalamic-pituitary-testicular axis can be understood by gonadotropin-releasing hormone or clomiphene stimulating test. Testosterone levels might be directly determined. Reflects the function of interstitial cells. 5. Doppler ultrasound exam. Helps confirm varicocele. 6. X-ray inspection. In order to determine the obstruction site in the vas deferens, vas deferens, epididymis angiography, vas deferens, seminal vesicle angiography or urethrography could be used. 7. immunological examination. Sperm agglutination antibodies or brake antibodies in serum or seminal plasma are detected by sperm agglutination test or brake test. 8. testicular biopsy. For spermless or oligozoospermia, directly look at the spermatogenic function with the testicular seminiferous tubules as well as the progression of interstitial cells. 9. chromosome karyotype analysis. For genital malformations, testicular dysplasia and unexplained azoospermia.