A group of researchers at the University of North Carolina has discovered that ultrasound could be helpful in preventing the sperms to develop, making the humans infertile. It has been found in a latest research that ultrasound doses can successfully be used to reduce the number of cells that produce sperms.

The team conducted an analysis on rats and confirmed that one or two doses of ultrasound provided to the testicles of rats help to prevent sperm production in them. Thus, the researchers are anticipating that the same procedure or technique may be helpful for humans also.

A study was made by the researchers recently in the North Carolina, in which they gave two doses of ultrasound to the testicles of rats, each for 15 minutes. They then concluded that the doses had shown a significant fall in their levels of sperm production. Sperms were noted to have diminished below 10 million sperm per milliliter.

Also, it was revealed by the team that the technique of ultrasound zap doses was found to be more effective and useful when it was given separately on two days with the aid of hot salt water.

Though the concept of ultrasound doses had been initially introduced in the 1970s, but researchers said that there is a great need to confirm if the doses of ultrasound would result in contraception in humans and not in sterilization.

James Tsuruta, a lead researcher of the study, said, "Further studies are required to determine how long the contraceptive effect lasts and if it is safe to use multiple times". It was told that as compared to rats, men needed to lessen their sperms by more than 10 million sperm per milliliter so as to become infertile. Thus, there is an equal need to ensure that extra doses of ultrasound do not lead to any harm in future.