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The color laminated cocktail inspired a new male contraceptive



Most methods of contraception are targeted at women, whether they are hormonal contraceptives such as a "pill" or more invasive methods such as implants or intrauterine devices. For men, there are basically only two forms of contraception: condoms and vasectomy. Condoms are effective for a short time, but can lead to unintended pregnancies when they are broken or manipulated incorrectly. Vasectomy is effective over the long term, but is not always reversible. This is why research groups are developing and testing a variety of methods.

The latest notable attempt at male contraception comes from China – and was inspired by a charming color cocktail. Bartenders prepare the Galaxy by layering different types of fluids, which become homogenized only when mixed or heated.

A team of scientists at Nanchang University led by Xiaolei Wang used a similar approach and injected individual layers of clogs to block the vas deferens – a canal that carries sperm from the testicle into the urethra. When the materials were injected into male rats, the pregnancy was excluded for more than two months. At the end of this period, rats researchers flooded an infrared lamp for several minutes, causing the layers to mix and dissolve. The animals then produced offspring when compiled, the authors said in the magazine ACS Nano.

Before anyone is too excited, it's just a pilot experiment that will require further safety testing. After all, the beverage does not seem particularly safe: a hydrogel that physically blocks sperm; gold nanoparticles; ethylenediaminetetraacetic acid (EDTA), a chemical that decomposes hydrogel and also kills sperm; and a finishing layer of gold nanoparticles.

Other scientists are investigating oral and antiretroviral agents for men who reduce sperm count by preventing pregnant women from producing enough testosterone

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