Hi,

I am working on a report on new contraceptive methods that will include
a chapter on male methods. Unfortunately, due to lack of space a lot of
my research will be cut, including the section on heat methods. So in
hopes that it will reach at least some readers, I am pasting it below.
It may address some of the questions recently posted to this list.

Mild Testicular Heating. Investigators suspected for centuries that
heat could reduce male fertility, although it was not until the 1920s
that research involving the heating of testicles in animal models
provided scientific evidence of this effect (Fukui 1923; Moore and Chase
1923). Heating the testes to or slightly above body temperature disrupts
sperm production, while severe or prolonged heating of the testis
completely suppresses sperm production. Heat methods are easily
reversible and non-surgical (Kandeel and Swerdloff 1988).

The use of close-fitting underwear alone and such underwear along with
a soft ring that keeps the testes close to the inguinal canal have been
tested. In an Egyptian study of 14 men wearing a polyester scrotal sling
day and night for 12 months, all became azoospermic after a mean of 140
days, and all remained azoospermic for the remainder of the year. None
of their partners became pregnant and the effect was fully reversible
(Shafik 1992). In a French study, of 3 men using such underwear during
waking hours for 42 cycles, there was only 1 pregnancy, and of 6 men
using the underwear along with a ring there were no pregnancies (Bujan
and Mieusset 1995). In men wearing the ring-enhanced underwear, sperm
counts and sperm motility rates are reduced (Mieusset and Bujan 1994).
Another patented approach involves wearing underwear connected to an
external heat source—an insulated scrotum sack containing heating
elements and a thermometer, but this apparatus has not been clinically
studied (Lissner 1994).


Bujan, L., & Mieusset, R. (1995). Male contraception by testicular
heating. [Contraception masculine par hyperthermie.], CONTRACEPTION,
FERTILITE, SEXUALITE (pp. 611-4.).

Fukui, N. (1923). On a hitherto unknown action of heat ray on testicles.
Japan Medical World, 3, 27-28.

Kandeel, F. R., & Swerdloff, R. S. (1988). Role of temperature in
regulation of spermatogenesis and the use of heating as a method for
contraception. Fertil Steril, 49, 1-23.

Lissner, E. (1994). Frontiers in nonhormonal male contraception: A call
for research: Male Contraception Information Project.

Mieusset, R., & Bujan, L. (1994). The potential of mild testicular
heating as a safe, effective and reversible contraceptive method for
men. Int J Androl, 17, 186-91.

Moore, C., & Chase, H. (1923). Heat application and testicular
degeneration. The Anatomical Record, 26, 344-403.

Shafik, A. (1992). Contraceptive efficacy of polyester-induced
azoospermia in normal men. Contraception, 45, 439-51.





twoanddone21 wrote:

> I tried posting a similar message a couple days ago, I'll try again:
>
> I've read about heat methods and Vogeli's experiments. Is a heating
> pad a suitable replacement for hot water. It's difficult to maintain
> water temperatures and sit in a tub for 45 minutes a night for two
> weeks. Are there any dangers with a heating pad besides the obvious
> burning or scalding, etc. How long do you need to apply the heat per
> session and how many days. Also when will the results take place.
> Is it a month after you end the treatment or immediate. I know it's
> not foolproof but it sounds like a good alternative. Thank you
>
>
>
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