In General, man must have enough healthy sperm, patency of ejaculatory duct, good ejaculation function, with fertility.
The lack of one of the above terms, there is a risk of infertility.Male sterility in common cause with the following categories:
(L) germ barrier: such as congenital Testicular dysgenesis, cryptorchidism, testicular tuberculosis, mumps Orchitis concurrently or testicular atrophy, radiation or pesticides damage, lack of certain nutrients, endocrine diseases, etc., may lead to decreased sperm count, motility, or deformity, cause sterility.
(2) the semen is blocked: vas deferens, epididymis, ejaculatory duct and urethral diseases that may cause the semen transportation barriers, thus affecting children.
(3) the ejaculation disorder: such as impotence, external genitalia malformations, trauma, unable to have sexual intercourse, or premature ejaculation, retrograde ejaculation, sperm cannot enter the female genital tract, nor can you nurture conceived.
(4) other factors: certain systemic diseases such as severe malnutrition, anemia, leukemia, poison, take anticancer drug, excessive smoking, alcoholism, long-term use crude cottonseed oil (which contains the germ-resistant material gossypol), sperm antigenic too strong, and the lack of fructose in semen, the seminal vesiculitis, prostatitis, prostate-exception, trace elements or vitamin deficiency, etc., may cause obstacles to lead generating sterile.
(Practice editing: Chen Dong ping)
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