The tests that need to be done for men who are not pregnant mainly include physical examination, ultrasonography, immunologic examination, genetic examination, vasovaginography, testicular biopsy examination and so on. 1. Physical examination: it can check whether there is any developmental abnormality in male testicles, scrotum, penis and other genitals. 2. Ultrasonography: Through ultrasonography, it can find out whether men have varicocele, vasovaginal obstruction, testicular syringomyelia, testicular tumor, cryptorchidism and other diseases. 3. Immunological examination: it can find out whether men have anti-sperm antibodies, and if there is a positive test result, it may affect pregnancy. 4. Genetic examination: it can know whether men have genetic diseases and chromosomal abnormalities. 5. Vasovaginography: to find out whether there is blockage of the vas deferens. 6. Testicular biopsy: It can understand the condition of testicular spermatogenesis and can diagnose and evaluate testicular diseases. It is necessary for patients to undergo appropriate tests under the guidance of specialized doctors.