There are some misunderstandings in the diagnosis of azoospermia, how to avoid them? Myth 1: Azoospermia is diagnosed after 1 or 2 semen tests. Correct test: The test for azoospermia requires that no sperms are found in at least 3 or more semen tests at different times. Because some patients have low testicular spermatogenesis, not every semen analysis will find sperm in the semen. Therefore, azoospermia cannot be easily diagnosed by examining the semen 1 or 2 times Myth 2: Azoospermia is diagnosed by routine semen examination. Correct test: Azoospermia test requires that no sperms are found in the semen after centrifugation (centrifugation at 3,000g for 15 minutes) to be accurate. This is because in some cases, spermatozoa can only be detected on microscopic examination after centrifugation of the semen. Therefore, there will be diagnostic error if there is no semen centrifugation after microscopic examination. Myth 3: Azoospermia is diagnosed when no semen is seen after ejaculation. Correct examination: not seeing semen after ejaculation belongs to azoospermia, not azoospermia. Because (1) patients with sexual dysfunction such as ejaculation have spermatogenesis, but are unable to discharge semen (2) retrograde ejaculation patients semen in the ejaculation of semen into the bladder, not from the urethra normal discharge, this type of patients also have spermatogenesis, so patients with azoospermia should also be ruled out the existence of ejaculation or retrograde ejaculation.