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

The male contraception It has a promising future. In order to reduce the burden of contraception in women, several successful clinical trials are several.

In this line, a group of Chinese researchers inspired a new method of male contraception, nothing more and no less than a multicolored cocktail named Galaxy.

It turns out that it is an alcoholic beverage, the ingredients of which form colored layers in the glass in which it is prepared, which resembles the galaxy in space. The researchers noticed that this beverage formed completely different layers. However, by shaking or exposing heat, the layers break and the components mix in one.

This led to the idea of ​​a contraceptive that works just like a cocktail, but inside the squirrel deferen, which are the tubes through which the semen is transported from the testicles to the urethra.

As described in more detail in 2009 ACS Nano , the results of the Xiaolei Wang team were positive in the rat tests. Thus, they created a contraceptive, the effect of which can be removed by heat.


The researchers sequentially injected four layers of different substances into male males. The first layer consists of a hydrogel, a substance that acts as a physical barrier to prevent sperm crossing.

Then they injected a layer of gold nanoparticles heated to infrared light. They then injected ethylenediamine tetraacetic acid (EDTA), which disrupts the gel and kills the semen and seals the channel with another layer of gold nanoparticles.

In this way, the semen is not only prevented through the pipelines, but is eliminated by EDTA. But it is interesting that if you want to change the contraceptive process, you just have to heat up with infrared and the gold nanoparticles will do their job by mixing with the rest of the layer and allowing them to re-enter the semen.

Now that the rats have been shown to be effective, researchers hope to test their method for humans, as well as guarantee the safety of the compounds used.

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