Document Detail

Semen characteristics and plasma levels of testosterone after bilateral vasectomy in bucks.
MedLine Citation:
PMID:  12464078     Owner:  NLM     Status:  MEDLINE    
The effects of bilateral vasectomy on the seminal characteristics were assessed in six bucks of the Canarian breed. In addition, we tried to establish the effects of vasectomy on the plasmatic concentrations of testosterone and the libido of the bucks. Semen samples were collected once a week from 8 weeks before to 16 weeks after vasectomy; blood samples were collected prior to vasectomy, and then at once and 1 week after vasectomy and every 2 weeks from the week 4 to the end of the experiment. One week after the vasectomy, ejaculated spermatozoa were non-motile and the percentage of live spermatozoa was below 5% in all vasectomized males; in addition, the total number of cells/ejaculate was 3100 x 106 and 30 x 106 spermatozoa in the control and vasectomized males, respectively. Our results suggest that the vasectomized males may be used as oestrus detectors, without risks of accidental fecundating, only 1 week after vasectomy. Before vasectomy, no significant differences were observed in plasma levels of testosterone between the vasectomized and control males (5.4 +/- 1.2 and 3.9 +/- 1.4 ng/ml, respectively); from 4 to 12 weeks after vasectomy, a marked decrease in the testosterone concentration in all males (vasectomized and control bucks) was observed. From 12 weeks after vasectomy until the end of the experiment, four of the vasectomized males and the control males recovered their normal libido. The results suggest that vasectomy did not exert a remarkable effect on the steroidogenic functionality of the testicle.
M Batista; N Prats; P Calero; F González; F Cabrera; A Medrano; A Gracia
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Reproduction in domestic animals = Zuchthygiene     Volume:  37     ISSN:  0936-6768     ISO Abbreviation:  Reprod. Domest. Anim.     Publication Date:  2002 Dec 
Date Detail:
Created Date:  2002-12-04     Completed Date:  2003-03-03     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  9015668     Medline TA:  Reprod Domest Anim     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  375-8     Citation Subset:  IM    
Reproduction and Obstetrics, Faculty of Veterinary, Las Palmas de Gran Canaria, Spain.
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MeSH Terms
Behavior, Animal
Case-Control Studies
Goats / blood,  physiology*
Semen / physiology*
Sperm Count / veterinary
Testosterone / blood*
Vasectomy / methods,  veterinary*
Reg. No./Substance:

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