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Top: The human vas deferens on high-resolution ultrasound.
Bottom: Vasalgel in a dog vas deferens. Yep, that white spot is what the excitement is all about!
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Once Vasalgel male contraceptive is available, how will the men who have it know that it's still in place? Of course the most important thing is the result -- zero sperm -- showing that it's working, and you can tell that with a semen test. But wouldn't it be nice to be able to see it, too? Enter ultrasound! Yes, an ultrasound scan -- the same kind commonly used in medical diagnosis -- can be used to confirm the presence of Vasalgel.
We wondered whether the same technique could be used to confirm the presence of Vasalgel in the canine vas deferens -- and yep, it can, as seen here. The section of vas is buried a little deeper in the dog, so you don't see the glorious detail, but it's enough to see that the Vasalgel is there, and how long a section.
This is good news -- this widely available technique should be usable to confirm the presence of Vasalgel in humans once human clinical trials begin, giving double assurance in addition to semen tests. |