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We developed a cup-shaped silicone-dacron prosthesis that may be used as a sperm reservoir. Spermatozoa aspirated from this reservoir and stored as pellets in liquid nitrogen for 6 weeks induced pregnancies and normal births in 50 per cent of inseminated cows. Because of aplasia or long stenosis of the vas deferens 26 prostheses were implanted upon the epididymis in 14 patients. Percutaneous aspirations up to 7 months postsurgery showed 0.3 to 105 million spermatozoa the quality and quantity of which decreased with time. Insemination of patients' wives has not resulted in pregnancy.
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Gynakologische Rundschau,
