Approximately 15-20% of couples attempting their first pregnancy meet with infertility problems. Most authorities define these patients as having primarily
infertility if they have been unable to achieve a pregnancy after one year of unprotected intercourse. Over the past twenty years the data reveal that in approximately 35% of cases pathology is found in
the man alone, and in another 20% both the man and woman's have a problem.
Male infertility normally involves the man's sperm, for example when the sperm is abnormal and thus it may have a shortened life span or the abnormality may prevent it from moving correctly
and prevent the sperm's ability to reach the egg and fertilize it.
A second sperm related factor is when there is a problem in the number of sperm produced or there is problem with ejaculation of the sperm. The number and quality of a man's sperm can be affected by his
overall health and lifestyle. Some things that may reduce sperm number and/or quality include:
alcohol
drugs
environmental toxins, including pesticides and lead
smoking cigarettes
health problems
medicines
radiation treatment and chemotherapy for cancer
age
a genetic condition,
congenital disorders
severe illness, e.g. mumps
a hormone disorder
A scrotal varicocele is the most common causative finding in infertile men. Varicocele is an abnormal enlargement of the veins in the scrotum draining the testicles. It occurs in
6% of children at age 10, 13% of adolescents, 15 percent of males in the general population. However, varicocele has been observed in 35% of men with primary infertility and up to 80% of men with secondary
infertility. Although many men with varicocele can father children, varicocele causes a progressive time-dependent decline in semen quality.
A third area of male infertility is ejaculation problems including premature ejaculation, retrograde ejaculation (which occurs when the semen is forced back into the bladder), drug related
complications, and erection problems.
Sexual dysfunction has been reported in up to 20% of infertile males. Decreased sexual drive, erectile dysfunction, premature ejaculation and failure of intromission are all potentially
correctable causes of reproductive failure. Decreasing libido and erectile dysfunction may reflect low testosterone levels with an organic cause. Performance anxiety is also often reported and often abated
with reassurance.
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