Story at a glance
- A woman inventor in Germany took home the Dyson Award for her groundbreaking work in creating male contraception.
- German scientist Rebecca Weiss invented the COSO, an “ultrasound-based, reversible and hormone-free” form of male contraception.
- The COSO uses an ultrasound on the testicles to temporarily stop the sperms’ motility so that they can’t fertilize an egg.
A woman inventor in Germany took home the Dyson Award for her groundbreaking work in creating male contraception, which will now go on to the international stage of the award process.
German scientist Rebecca Weiss invented the COSO, an “ultrasound-based, reversible and hormone-free” form of male contraception.
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“About a year ago I was diagnosed with cancer precursor cervix due to contraception with the pill,” Weiss told Dyson. “After that, hormonal contraception was no longer an option. When my partner and I were looking for an alternative method, we became aware of the lack of male contraceptives.”
“So I decided to deal with the development of a new contraceptive approach for men in my master thesis in Industrial Design at the Technical University in Munich,” Weiss added.
The COSO is a device personally made between the person and their doctor “according to individual testicle size.” Prior to intercourse, the device is filled with water up to an established marking and heated to a specific temperature, at which point the user places their testicles into the device, and the ultrasound begins. The ultrasound temporarily stops the sperms’ motility so that they can’t fertilize an egg.
The process is temporary, reversible, and hormone-free. The COSO is still awaiting clinical testing.
“There are only two established methods of contraception for men, the condom and the permanent vasectomy,” Weiss said, adding, “COSO, in contrast, offers a user-friendly contraceptive approach that is easy to use without any kind of physical intervention, pain or previously known side effects.”
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