"Before, infertility was defined as a couple’s inability to achieve pregnancy after one
year of unprotected intercourse. But new guidelines
by the American Society of Reproductive Medicine, as discussed at a
recent World Health Organisation expert meeting, advises women and men
over 35 years to seek fertility evaluation if they fail to conceive
after six months of trying.
An estimated 15 per cent of couples fail this criterion and are
considered infertile. The interesting thing is that 35 per cent of the
factors responsible for infertility are due to female factors, 30 per
cent for male, 20 per cent for both sexes while 15 per cent is due to
unexplainable factors."
Male infertility is usually caused by problems that affect either sperm
production in the testes or sperm transport. Conditions in men that
affect fertility are still generally under-diagnosed and undertreated
due to lack of information and ignorance.
Low sperm count (oligospermia) is a leading cause of infertility or
sub-fertility issues among men. While it requires only one sperm to
fertilise the ovum, the odds of conception are such that it takes
millions of sperm per millilitre of semen to actually achieve the goal
of fertilisation.
A “normal” sperm count is about 20 million or more per millilitre of
semen. Over 60 per cent of the sperm in each sample should exhibit
normal morphology and indicate typical motility – the forward-swimming
movement.
Oligospermia – or low sperm count is indicated in simple tests that
reveal the concentration of sperm in a given sample quantity. In
general, scientists and fertility doctors are noticing a drop in sperm
count and motility, which makes it harder for couples to make babies.
Other factors attributed to this include the following:
Drug use
Anabolic steroids taken to stimulate muscle strength and growth can
cause the testicles to shrink and sperm production to decrease. Use of
cocaine or marijuana might reduce the number and quality of your sperm
as well.
Drinking alcohol can lower testosterone levels and cause decreased sperm production.
Occupation
Certain occupations might be linked to a risk of infertility, including
welding or those associated with prolonged sitting, such as truck
driving. However, the data to support these associations are
inconsistent.
Poor lifestyle
Men who smoke might have a lower sperm count than those who don’t smoke.
Obesity can impair fertility in several ways, including directly impacting sperm and by causing hormone changes.
Plastics
Bisphenol, BPA, a substance in plastics found in many household
products, can lower sperm count and motility. A 2008 study in the
journal Fertility and Sterility,
showed that men with high concentrations of BPA in their urine also had
low sperm counts. Food packaging is a major source of BPA which can
seep into foods.
Pesticides
Scientists have also noted that farmers are exposed to pesticides that
tend to lower their sperm count. The chemicals runoff gets into tap
water and can disrupt hormonal processes.
Tumours
Cancers and non-malignant tumours can affect the male reproductive
organs directly. Surgery, radiation or chemotherapy used to treat
tumours can also affect male fertility.
Undescended testicles
During foetal development, one or both testicles sometimes fail to
descend from the abdomen into the sac that normally contains them
(scrotum).
Chromosome defects
Inherited disorders such as Klinefelter’s syndrome — in which a male is
born with two X chromosomes and one Y chromosome instead of one X and
one Y — cause abnormal development of the male reproductive organs.
Other genetic syndromes associated with infertility include cystic
fibrosis, Kallmann’s syndrome and Kartagener’s syndrome.
Celiac disease
A digestive disorder caused by sensitivity to gluten, celiac disease can
also cause male infertility. Fertility may improve after adopting a
gluten-free diet.
Certain medications
Testosterone replacement therapy, long-term anabolic steroid use, cancer
medications (chemotherapy), certain antifungal and antibiotic
medications, some ulcer medications and other medications can impair
sperm production and decrease male fertility.
Prior surgeries
Certain surgeries such as vasectomy, inguinal hernia repairs, scrotal or
testicular surgeries, prostate surgeries, and large abdominal surgeries
performed for testicular and rectal cancers might prevent you from
having sperm in your ejaculate. In most cases, surgery can be performed
to either reverse these blockages or to retrieve sperm directly from the
epididymis and testicles.
Environmental causes
Sperm production or function can be affected by overexposure to certain environmental elements, including:
Industrial chemicals: Extended exposure to benzenes, toluene, xylene,
herbicides, pesticides, organic solvents, painting materials and lead
might contribute to low sperm count.
Radiation or X-rays: Exposure to radiation can reduce sperm production.
It can take several years for sperm production to return to normal. With
high doses of radiation, sperm production can be permanently reduced.
It is being reported that keeping mobile phones in the pocket near the
upper thigh is extremely dangerous to sperm cell production and
morphology.
Overheating the testicles: Elevated temperatures impair sperm production
and function. Although studies are limited and are inconclusive,
frequent use of saunas or hot tubs might temporarily impair sperm count.
Sitting for long periods, wearing tight clothing or working on a laptop
computer for long stretches of time also might increase the temperature
in your scrotum and slightly reduce sperm production."
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