Document Detail

Miniature ponies: 1. Follicular, luteal and endometrial dynamics during the oestrous cycle.
MedLine Citation:
PMID:  18402757     Owner:  NLM     Status:  MEDLINE    
Follicular dynamics were studied during 12 interovulatory intervals (IOIs) and 36 preovulatory periods in Miniature mares. The percentage of IOIs with the following follicle events was: ovulatory wave with only one follicle>or=10 mm (55%), diameter deviation similar to previous reports in larger mares (25%) and minor waves emerging before or after the ovulatory wave (55%). Follicle data were compared among Miniature ponies, large ponies and Breton horses (n=12 IOIs per breed). The IOI was longer (P<0.001) in Miniature ponies (23.3+/-0.9 days) and in large ponies (23.9+/-0.5 days) than in Breton horses (20.3+/-0.7 days). The Miniature ponies had fewer (P<0.0001) growing follicles>or=10 mm per ovulatory wave (1.5+/-0.3) and more (P<0.0004) ovulatory waves (6/11) with only one follicle>or=10 mm than large ponies (9.8+/-0.8 and 0/12) and horses (5.8+/-0.9 and 0/12). Maximum diameter of the preovulatory follicle was smaller (P<0.003) in the Miniature ponies (38.3+/-0.7 mm) than in the horses (44.5+/-1.4 mm), but the difference between breeds was slight (6%) compared with the difference in bodyweight (65%). Considering the small number of follicles per ovulatory wave, Miniature mares are a potential model for comparative studies in folliculogenesis within and among species.
E L Gastal; A P Neves; R C Mattos; B P L Petrucci; M O Gastal; O J Ginther
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Reproduction, fertility, and development     Volume:  20     ISSN:  1031-3613     ISO Abbreviation:  Reprod. Fertil. Dev.     Publication Date:  2008  
Date Detail:
Created Date:  2008-04-11     Completed Date:  2008-06-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8907465     Medline TA:  Reprod Fertil Dev     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  376-85     Citation Subset:  IM    
Department of Pathobiological Sciences, University of Wisconsin, Madison, WI 53706, USA.
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MeSH Terms
Corpus Luteum / physiology*,  ultrasonography
Endometrium / physiology*,  ultrasonography
Estrous Cycle / physiology*
Follicular Phase / physiology
Horses / physiology
Luteal Phase / physiology
Ovarian Follicle / physiology*,  ultrasonography

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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