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Male Birth Control: One Step Closer! 3-25-08
A contraceptive containing the hormones testosterone and progestin has been
shown to safely and effectively suppress sperm production in most men, according
to a new study.
Researchers say the combination of testosterone and progestin, a synthetic form
of the hormone progesterone, worked better and faster to suppress than
testosterone alone, according to a study that will be published in the May issue
of the Journal of Clinical Endocrinology & Metabolism.
"It is possible to suppress sperm output to concentrations that are comparable
with reliable contraception in most, but not all men," said associate professor
Peter Y. Liu of the University of Sydney, Australia, and lead author of the
study, in a statement. "The rate of suppression is comparable to that achieved
after a vasectomy."
The contraceptive effects of testosterone and progestin would be reversible,
according to researchers.
Testosterone and other male hormones act as contraceptives by creating negative
feedback in a man’s reproductive system, suppressing the production of sperm,
according to the study. Researchers analyzed all published male hormonal
contraceptive studies from 1990 to 2006 with durations of at least three months.
In a total of 30 studies, 1,756 men between the ages of 18 and 51 were treated
with different preparations of testosterone, with or without progestin.
While testosterone is the primary male sex hormone, progestin is used in
combination with estrogen for female contraception and occurs naturally in
females as progesterone.
"Progestin co-administered with testosterone increased both the rate and extent
of suppression," Liu said. "It also may make long-term hormonal contraception
safer by reducing the dose of testosterone needed for maintenance
contraception."
The researchers also found that Caucasian men suppressed sperm output faster,
but not as completely, as non-Caucasians. Younger men with lower natural
testosterone levels had faster suppression, but the differences were relatively
small, the study found.
Comment From Dr. Beth Dupree left on Fox News Website:
Both Testosterone and Progesterone are found in Men. However Progestin and
methyltestosterone is not. Both synthetic drugs have harmful and untested long
term effects. Methyltestosterone is the only form available in tablet form (all
other forms are injected or dermally applied). Progestin is most commonly
collected and made from Pregnant Mare urine. The side effects of both of these
unnatural drugs in men would include: breast tenderness and growth, cancer,
liver disorders, birth defects and emotional disorders to name a few. Would any
man put up with these symptoms? And what loving wife would want to see her
husband feeling this way?
There is a rush to get a working form of male contraception due to the recent
studies showing that synthetic hormones in woman are dangerous. And because
woman are sick and tired of being sick and bearing all the burden of the
childbearing decision.
With so many childhood disorders with many possible causes (SIDS, Autism,
etc...) Is it a really good idea to add more mutagenic factors to our gene pool?
As it stands today, the safest forms of birth control are still natural forms:
rhythm method, lambskin condoms, and abstinence. None of these forms carry any
risks or side effects other than pregnancy. If you are not ready for the
responsibility of raising a child, you are not ready to have sex! I know that
male contraception is the ultimate woman's liberation but it is no substitute
for love, caring and communication.