Progress
As of 2005, human clinical trials are being performed to evaluate its effectiveness as a contraceptive. One version is currently in research and development by Shepherd Medical in Vancouver. Another version currently being researched in China is an elastomer plug device, using medical-grade polyurethane (MPU) and silicone rubber (MSR) injected as a liquid.
The U.S. Food and Drug Administration (FDA) approved human clinical trials for the intra-vas device in 2006.
Read more about this topic: Vas-occlusive Contraception
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—Henry David Thoreau (1817–1862)