Causes, tests and treatment of azoospermia? There are two types of azoospermia: obstructive and non-obstructive. Non-obstructive means that the testes have no spermatogenic function and tests such as sex hormone 6 and chromosomal tests are needed to determine the cause and whether it can be treated. Obstructive refers to the testes have spermatogenic function, but the way out is blocked and the sperm can’t get out. In this case, it is necessary to check the biochemistry of seminal plasma and vasectomy to find out the site of obstruction, and then consider treatment options. At worst, IVF can be done.