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This product is a mesh-like vas deferens plug that intentionally allows subfertile levels of sperm to pass through it to reduce the buildup of pressure in the epididymis. The plug is made of flexible synthetics and anchored to the vas wall with a suture. Two very small holes near its tip allow some sperm to pass through. There is also a version with copper.
May 30, 2018
Potential Multi-Purpose Technology (MPT):
National Research Institute for Family Planning in Beijing
The plug was licensed for commercialization, but work has been stalled due to lack of funding.
A phase II, randomized, controlled clinical trial completed in China compared the method effectiveness with that of no-scalpel vasectomy. It was somewhat less effective (94% instead of 98%), but there were fewer side effects.
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