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Current knowledge on the transport and fate of spermatozoa in the reproductive tract of the bitch.
MedLine Citation:
PMID:  24947854     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Canine sperm transport, distribution, storage and detachment is a complex, dynamic and highly regulated process. Transport of sperm within the bitch's reproductive tract is rapid and is influenced by the method of semen deposition (natural mating or artificial insemination) and by the timing of breeding in relation to the day of ovulation. The fertile lifespan of spermatozoa in the reproductive tract of the bitch is considerably longer than in most other domestic species, and the main sperm reservoirs appear to be the uterine crypts and the distal part of the uterotubal junction, where spermatozoa attach by their heads to uterine epithelium. While several in vitro studies demonstrated prolonged motility and viability of canine spermatozoa after coincubation with uterine tube explants, spermatozoal storage has not been documented in the canine uterine tube isthmus or ampulla in vivo. Several factors, including exposure to progesterone, solubilized zona pellucida proteins and post-ovulation uterine tube fluid, appear to trigger membrane events resulting in capacitation-like changes with subsequent motility pattern changes (transitional and hyperactivated) that are associated with sperm detachment. After mating or insemination, a normal low-magnitude post-mating uterine inflammatory response occurs, evidenced by an influx of polymorphonuclear neutrophils (PMNs), increased uterine contractions and an increased uterine artery blood flow. Recently, it was also shown that normal dogs with cystic endometrial hyperplasia develop a more significant endometritis, show fewer mating-induced uterine contractions, a decreased ability of spermatozoa to bind to uterine explants in vitro and a slower uterine clearance after mating.
Authors:
T Rijsselaere; Gcw England; Sl Freeman; D Maes; A Van Soom
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Reproduction in domestic animals = Zuchthygiene     Volume:  49 Suppl 2     ISSN:  1439-0531     ISO Abbreviation:  Reprod. Domest. Anim.     Publication Date:  2014 Jun 
Date Detail:
Created Date:  2014-06-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9015668     Medline TA:  Reprod Domest Anim     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  2-7     Citation Subset:  IM    
Copyright Information:
© 2014 Blackwell Verlag GmbH.
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