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May 31, 1976

Medical News

JAMA. 1976;235(22):2375-2387. doi:10.1001/jama.1976.03260480003001

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Ultrasound exposure decreases sperm production in men, animals  Ultrasound is being studied as a reversible method of male contraception with no apparent side effects. Investigators at the University of Missouri Columbia School of Medicine have been able to use sound to suppress spermatogenesis in several animal species and in men with carcinoma of the prostate who were hospitalized prior to orchiectomy.The subjects were treated in apparatus designed to allow the testes to rest in a plexiglass cup filled with water that acts as a conductor, according to Mostafa S. Fahim, MD, professor and chief of reproductive biology. He explained that the combined effect of heat and mechanics may cause an ion exchange between the fluid, and the seminiferous tubules and rete testes to create an unsuitable environment for spermatogenesis.In his report to the Las Vegas meeting of the American Fertility Society, Dr Fahim said that the animal