The causes of male infertility can be divided into two categories:
First, the problem of testicular nerve function, there are many diseases that may lead to abnormal testicular nerve function, leading to oligozoospermia, asthenospermia and abnormal sperm, thus affecting semen quality and leading to infertility;
Secondly, some problems of vas deferens, such as obstruction of vas deferens and some congenital developmental abnormalities, may also affect sperm transport, and correspondingly affect the quality of semen, and even lead to azoospermia and male infertility.
In addition, some men's varicocele, hypogonadism, some cryptorchidism, and even some diseases or inflammation may cause male infertility.