U.S. scientists are convinced that they are close to discovering a new form of contraception. Ultrasound beam directed at the nucleus may stop sperm production - reports service, bbc.co.uk.
Studies in rats in a laboratory Reproductive Biology and Endocrinology have shown thatsound waves can be used to reduce the number of sperm to a level that would causeinfertility in humans.
The very idea of using the beam appeared for the first time in the 70's of last century. But only with financial support from the Bill & Melinda Gates Foundation, researchers from theUniversity of North Carolina could look into this matter more closely.
They found that two 15-minute dose of "significantly reduce" the number of sperm-producing cells.
Lead researcher Dr James Tsuruta said that "further studies are needed to determine how long it lasts and whether the contraceptive effect after repeated use of beams, it is safe forhealth." The team must determine whether the effect of ultrasound produce reversiblecontraception, and if there is no complete sterilization.