Thursday, August 21, 2003Sperm controlSujoy Guha, a professor of biomedical engineering at the Indian Institute of Technology in Delhi, has spent the last 25 years perfecting an invention - Reversible Inhibition of Sperm Under Guidance (RISUG). This has the potential to be a breakthrough in the world of contraception, mainly because it's for MEN. RISUG works by an injection into the vas, the vessel that serves as the exit ramp for sperm. The injection coats the vas with a clear polymer gel that has a negative and positive electric charge. Sperm cells also have a charge, so the differential charge from the gel ruptures the cell membrane as it passes through the vas, stopping the sperm in their tracks before they can even start their journey to the egg. RISUG doesn't affect the surrounding tissues because they have no charge. There are several really great advantages to this procedure. First, it's non-surgical, which should stop all you men from squirming in your seats. It lasts for at least 10 YEARS (thought it's reversible with another injection), has almost no side effects (except for a small swelling of the scrotum which quickly goes away) and it works! Of all the men who've had the RISUG injection (and 15 of the 250 had it more than 10 years ago), there has been only one unplanned pregnancy among their partners – and in that instance, the injection wasn't administered properly. It's currently in the clinical testing stages right now, but could be on the market in India by next year. And it may even eventually get to the US market. posted by chris at 2:00 PM ------------------ |
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