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Cocktail that inspired a group of Chinese scientists to create contraceptives for men Photo 1 of 6 | Science

The male contraception It has a promising future. Several methods pass the first phase of successful clinical trials to reduce the burden of contraception in women.

In this regard, a group of Chinese scientists has found inspiration for a new method of male contraception, nothing more than nothing but a multicolored cocktail called Galaxy,

It turns out to be a combined alcohol whose components form the colored layers in the glass in which it is prepared, which resembles a space galaxy. Scientists have noticed that this beverage forms perfectly separated layers. However, when shaking or exposing the heat, the layers disintegrated and the components mixed into one.

This created the concept of contraception that works the same way as a cocktail, but inside the vas deferens, which are the channels through which sperm transports from the testicle to the urethra.

As described in detail in an article published in ACS Nano , the results obtained by the Xiaolei Wang team were positive in their rat tests. In this way, they created contraceptives, the effect of which could be abolished by heat.


Researchers then injected four layers of different substances into the vas deferens of male rats. The first layer consists of a hydrogel, a substance that acts as a physical barrier that prevents the passage of sperm.

They then injected a layer of gold nanoparticles that are heated by infrared radiation. They then injected ethylenediaminetetraacetic acid (EDTA), which decomposes the gel and kills the sperm and closes the pipeline with another layer of gold nanoparticles.

In this way, semen not only prevents the passage of the channels but is eliminated by EDTA. But interestingly, if you want to reverse the contraceptive process, you just have to heat it with infrared radiation and the nanoparticles of gold will do their job, mix with the other layers and re-allow the passage of sperm.

Now that efficacy has been demonstrated in rats, scientists hope to test the method in humans as well as guarantee the safety of the compounds used.

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