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1 Department of Urology, General
Hospital of Salzburg, and the Zoological
Institute, University of Salzburg,
Salzburg, Austria
In 91 male rats, silver or platinum coils were
implanted into the vasa deferentia with the
hope of developing a simple and reversible
method for male fertility control. The insertion
of the coil by inguinal incision promises a high
success rate, and side effects such as sperm
granuloma, device extravasation, displacement of the testes, and artificial ascensus
could be prevented. In an in vitro experiment
simulating the vas deferens anatomical conditions, the immobilizing capacity of the device
was evident, and the motility of the spermatozoa decreased to 0% within 30 minutes. Longterm in vivo experiments showed no changes in
the reproductive organs. However, the high
rate of pregnancy after placement of the device
(55%) does not suggest that such devices could
offer a practical method of achieving male
sterility.
Key words: male fertility control, intravasal devices, surgical methods
Submitted on January 30, 1980
Revised on June 4, 1980
Accepted on June 11, 1980
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