Being too fat or thin can damage a man\'s fertility, scientists have said.
A study found that men of average weight had more healthy sperm than those outside the normal range. They also had higher volumes of semen.
http://ukpress.google.com:80/article/ALeqM5iKQr8vOAzSbliKJQbmgTZNXJKnug
Varicoceles are abnormally dilated testicular veins (pampiniform plexus) of in the scrotum, which is normally secondary to internal spermatic vein reflux. Varicocele is found in approximately 15% of the general population, 35% of men with primary infertility and in 75-81% of men with secondary infertility http://www.maleinfertility.org/new-varicocele.html
Varicocelectomy is the most common operation performed for male infertility.
Varicocele is found in approximately 10-15% of unmarried military recruits, 35 % of infertile men who have never fathered a child and 81 % of men who were once fertile but are now infertile (secondary infertility). http://www.maleinfertility.org/new-varicocelectomy.html
Congenital bilateral absence of vas deferens (CBAVD)is diagnosed in 1.3 % of the men referred for infertility evaluation. Moreover, CBAVD accounts for 27% of the men with primary obstructive azzospermia. An almost equal number of men with other causes of surgically unreconstrucatable obstructuctive azoospermia are referred for evaluation. http://www.maleinfertility.org/new-absence.html
Men with neurologic impairments in their sympathetic outflow, as in traumatic spinal cord injury (SCI), demyelinating neuropathies (multiple sclerosis), diabetes, and following retroperitoneal lymph node dissection (often for testis tumor), frequently have abnormalities or absence of seminal emission. Electroejaculation (EEJ) has been proven to be a safe and effective means to obtain motile sperm suitable for assisted reproductive techniques (intrauterine insemination or in vitro fertilization). http://www.maleinfertility.org/new-electroejaculation.html