Is generally believed that several formal tests of semen sperm counts were lower than 20 million / ml referred to as oligospermia. Pregnancy can significantly decrease, leading to a common cause of male infertility.
Etiology: The causes leading to oligospermia include the following seven areas:
1, varicocele varicocele, make the testicles of the local temperature increases, an increase of vasoactive substances, thereby affecting spermatogenesis. However, the degree of varicocele and sperm quality out of proportion.
2, cryptorchidism cryptorchidism affect the semen quality of important reasons. About 60% of patients with unilateral cryptorchidism, infertility, so if the sperm density is low, there cryptorchidism exists, the importance of early treatment.
3, reproductive tract infections, chronic infection of the subsidiary gonads, can affect a variety of laboratory indicators of semen.
4, autoimmune reproductive immunology The study found that autoimmunity can affect male fertility, anti-sperm antibodies can affect sperm production and delivery.
5, endocrine abnormalities and normal men, spermatogenesis depends on the hypothalamus - pituitary - gonadal axis function in normal and a part of any obstacle, will affect the spermatogenic function, other issues such as thyroid gland, adrenal gland disease can also affect gonadal function Erzhi oligospermia .
6, chromosomal abnormalities of the sperm density, chromosome aberrations, activity rates and patterns are severely affected.
7, other scrotal temperature is too high, radiation damage, chemical drugs and the influence of drugs can be caused by oligospermia.

Dong's Chinese Medicine Research Institute, Shijiazhuang Tel :0311-88468620