Well it may sound like a great idea, but gee it sounds a bit painful.

Scientists believe ultrasound sessions over the testicles can reduce sperm count and work as a reliable contraceptive ! Egads !

It seems zapping the testicles with ultrasound can reduce sperm counts and might be used in the future as an inexpensive, reliable and reversible male contraceptive, according to US researchers.

Scientists from the University of North Carolina School of Medicine, who conducted experiments on male rats, issued their findings in the journal Reproductive Biology and Endocrinology.
They said they were convinced that the method, if studied further, could be used on humans.
The team led by Doctor James Tsuruta found that by rotating high frequency (3MHz) ultrasound around the testicles, they were able to cause depletion of germ cells throughout the testes, the reports said.
The best results were seen using two ultrasound sessions of 15 minutes, two days apart.
Saline was used to provide conductivity between the ultrasound transducer and the skin, and the testes were warmed to 37 degrees, the study noted.

The procedure reduced the sperm count to zero, the researchers said.
Fertile men in normal conditions have more than 39 million sperm when they ejaculate.

Would you like to give it as go ?  Think I’ll pass.