production of sperms is heat sensitive. With increase in temperature, sperm
production decreases or stops, thus giving rise to sterility. This heat
sensitivity of sperms is used as a method for contraception. These methods are
relatively safe, effective, low cost and easily reversible. Let us learn some
of the methods of male contraception through heat methods.
Heat can have greater impact on male fertility.
There is another interesting hypothesis related to this fact. Men suffering
from very high fevers have been observed to be temporarily infertile. Then the
infant survival rates are also very high when the fathers
are healthy. These have further added to the hypothesis that heat can play a
great role in defining male fertility.
Does Heat Affect Sperm?
Heat can render a huge impact on male
fertility and this was known since time immemorial in human civilization.
We have come across such mentions in the texts of Hippocrates that can be dated
back to the 5th century BC. These methods were formulated on the
simple fact that the normal temperature in the testes must be considerably
cooler compared to the usual body temperature. This is due to the fact that the
entire process of spermatogenesis takes place here.
This has been later explained by the analysis that
since the testes in enclosed in the scrotum; it actually keeps the testes
outside the body. A heat exchange takes place between the incoming and the
outgoing blood vessels in this area and this process is akin to how the coils
of the refrigerator function.
This led to the development of the HSF or the heat
shock factor where the sperm
dies when the temperature rises to 95 0 Fahrenheit or 35 0
Celsius. It is important to note that briefs do not raise the temperature to
this level and thus does not impair his fertility.
Methods for Temporary Contraception
Here are a few heat methods that resulted in
This procedure requires simple hot water. It has
been declared effective by scientists in 1949 after a decade of rigorous
experimentation. This method is a bit time consuming but a natural one and
highly effective. The most vital point is that the men can successfully impregnate
a woman after he ceases to use this contraceptive procedure.
The testes of the man must be given a shallow bath
in warm water whose temperature should be around 116 degrees Fahrenheit for 45
minutes. This needs to be regularly done for three consecutive weeks. This
procedure results in six months of sterility and after six months the normal
If the temperature of water is reduced, the period
of infertility is also simultaneously reduced. Say if the water is 110 degree
Fahrenheit, it will result in just four months of infertility.
This is an acceptable temperature in regard to
normal human endurance as the threshold of pain is considered to be 118 degrees
These are tiny paraffin baths that are commonly used
to ease the arthritic pain in the elderly population. These baths come with
adjustable temperature controls, where the water is substituted by paraffin.
The contraceptive results will be the same if the depilatory wax warmers that
are used in beauty salons are used in its place. The temperature is constantly
monitored using a tempering thermometer or the digital water proof
It is important to conduct sperm tests to ascertain
that the methods used are effective.
Cryptorchidism Or Suspensories
This method works on the usage of insulated
underwear. The resultant heat affects spermatogenesis thereby causing contraception.
This can be attained if the temperature of the testes is raised to the normal
body temperature. This can result in partial infertility and it has also been
observed that men having retractile testes often have fertility issues.
So, when the man wears underwear that maintains the
testes closer to the inguinal canal, it can readily come in contact with the
body temperature. This can easily happen if the brief has a ring of soft
rubber. During the waking hours, the man should wear an under brief that can
hold his testes snugly against his body but the penis remains unenclosed.
Fertility returns to normal within 12-18 months after this method is