Document Detail


An intravital microscopy method permitting continuous long-term observations of ovulation in vivo in the rabbit.
MedLine Citation:
PMID:  16439509     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: A method for intravital microscopy of the rabbit ovary was developed to enable observations of real-time changes during ovulation in vivo. The aim was to correlate these events to biochemical events at specific stages of ovulation. METHODS: Virgin, female rabbits were primed with equine chorionic gonadotrophin (CG) (30-100 IU) then HCG (100 IU) 2 days later to induce ovulation. During anaesthesia, the right ovary was surgically exteriorized and submerged in an organ chamber with a microscopy lens positioned close to the ovary. Continuous video recordings were performed. RESULTS: Initial equine CG priming experiments revealed the highest ovulation rate, without premature luteinization, after 30 IU equine CG. This priming protocol subsequently demonstrated follicular ruptures 11.5-14 h after HCG. Numbers of ovulations from the exteriorized and contralateral non-exteriorized ovary were similar. The sequence of typical features of ovulation was: shutdown of microcirculation in the follicular apex, formation of petechiae in the follicular wall and a cone-shaped structure over the future rupture site, marked bleeding in connection with follicular rupture and a fairly steady extrusion velocity of granulosa cells and the oocyte. CONCLUSION: This method captured a sequence of structural changes during ovulation. It could be combined with blood and follicular fluid sampling for biochemical analysis and could be used in studies on biochemical reactions in relation to specific changes in the follicular structure during ovulation.
Authors:
Pernilla Dahm-Kähler; Carl Löfman; Ryota Fujii; Michael Axelsson; Per Olof Janson; Mats Brännström
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-01-26
Journal Detail:
Title:  Human reproduction (Oxford, England)     Volume:  21     ISSN:  0268-1161     ISO Abbreviation:  Hum. Reprod.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-02-20     Completed Date:  2006-05-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8701199     Medline TA:  Hum Reprod     Country:  England    
Other Details:
Languages:  eng     Pagination:  624-31     Citation Subset:  IM    
Affiliation:
Department of Obstetrics and Gynecology, Sahlgrenska Academy, Göteborg University, Sahlgrenska University Hospital, S-413 45 Göteborg, Sweden. pernilla.dahm-kahler@vgregion.se
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MeSH Terms
Descriptor/Qualifier:
Animals
Chorionic Gonadotropin / pharmacology
Female
Granulosa Cells / cytology,  drug effects,  physiology
Horses
Ovarian Follicle / cytology,  drug effects,  physiology
Ovary / cytology*,  drug effects,  physiology
Ovulation / drug effects,  physiology*
Rabbits
Chemical
Reg. No./Substance:
0/Chorionic Gonadotropin

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


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