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The first form of contraception available to men may be a new gel (gel) rubbed on the shoulders of men.
According to Sky News, the gel, which contains an industrial version of the hormone estrogen and a dose of testosterone, a male hormone, temporarily reduces the number of sperm cells in humans.
The US National Institutes of Health will begin clinical trials on the gel that will be produced under the Nestoron name.
According to the newspaper, the male reproductive system absorbs the hormones contained in the gel, after rubbing the back and shoulders, and progesterone, a female hormone, reduces sperm production by blocking normal levels of testosterone produced in the body.
A statement issued by the National Institutes of Health said that sperm numbers would reach very low levels and could decrease, but this should not affect men's fertility in the long run.
The testosterone present in the gel prevents harmful side effects that may be affected by normal levels of the hormone, such as low libido, erectile dysfunction and lack of hair growth.
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