A team of scientists at the University of North Carolina have found a novel way to cut sperm counts to levels that would make men infertile.
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Researchers from the University of North Carolina School of Medicine have successfully tested ultrasound treatment to reduce sperm counts in rats to levels that would cause infertility in men. They used commercially available therapeutic ultrasound equipment, with which they tested the effects of different frequencies, temperatures, and duration of ultrasound treatment on the sperm count. The results are published in the journal Reproductive Biology and Endocrinology.
The first report of the effect of ultrasound on germ cells and fertility was produced back in the '70s by Mostafa Fahim and colleagues at the University of Missouri at Columbia. The aim of the new study was to determine the effect of currently available ultrasound equipment and if this technology could be used as the basis for a male contraceptive in the future. Their findings show an optimal result with two consecutive ultrasound treatments at 3 MHz, 2.2 Watt per square centimeter, for a duration of 15 minutes at a temperature of 37 degrees Celsius when the sperm count in the rat model dropped to a level that would cause infertility in men.