Retrograde flow of spermatozoa into the urinary bladder of boars during collection of semen by electroejaculation |
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Authors: | Martin P A Dooley M P Hembrough F B Pineda M H |
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Institution: | Veterinary Medical Research Institute Iowa State University Ames, IA 50011 USA; Department of Veterinary Physiology and Pharmacology Iowa State University Ames, IA 50011 USA. |
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Abstract: | Boars that had a catheter implanted in the urinary bladder (n = 11) were used to determine the magnitude of retrograde flow of spermatozoa into the urinary bladder during electroejaculation. The overall mean (+/- SD) number of spermatozoa in the electroejaculate of boars was 22 +/- 20 x 10(9), with a mean range for individual boars of 3 +/- 3 to 48 +/- 13 x 10(9). The overall mean adjusted total number of spermatozoa in the post-electroejaculation urine was 1.038 +/- 2.656 x 10(9), and the mean percentage of retrograde flow of spermatozoa into the urinary bladder among boars ranged from 0% to 32.69%, with an overall mean percentage of retrograde flow of 7.51 +/- 17.82%. These findings indicate that in boars electroejaculation is associated with retrograde flow of spermatozoa into the bladder. |
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