‘Sonicated’ Sperm: Could Ultrasound Be the Next Male Contraceptive?

Condoms aren’t foolproof, and vasectomies may be too much so. Now researchers say they’re working on another contraceptive option for men that offers them more flexibility and control over their fertility. It’s based on ultrasound. Using sound waves in medicine isn’t new — obstetricians rely on them to take noninvasive pictures of a developing fetus, [...]