Ovarian Follicular Atresia of Ewes during Spring Puerperium.

Veterinary Medicine International
Radoslava VlčkováIgor Valocký

Abstract

The distribution of healthy and atretic follicles on the ovarian surface of improved Valachian ewes 17, 24, and 32 days postpartum is reported in this study. The number of healthy follicles was higher on day 24 postpartum and their mean diameter tended to increase to day 32 (P < 0.05) with the greatest diameter of 5 mm. 78-81% of atretic follicles ≥3 mm in diameter was observed where apoptosis began in the follicular cells situated at the follicular cavity. The early atretic follicles are characterized by the presence of mitotic pictures. In one ewe 24 days postpartum, small regressive follicular cysts were observed. Contracting atresia is characterized by thickening of the theca interna even to 190 μm. Progesterone and oestradiol-17β concentrations were maintained at relatively low levels, but with no significant difference between the days postpartum.

References

Jun 1, 1977·Australian Journal of Biological Sciences·K E TurnbullP E Mattner
Mar 1, 1987·Journal of Reproduction and Fertility·M A DraincourtL P Cahill
Mar 1, 1968·Journal of Animal Science·G B MarionJ B Choudary
Nov 1, 1993·Journal of Animal Science·J A HallP E Lewis
Apr 4, 2000·Physiological Reviews·S Y Hsu, A J Hsueh
Aug 22, 2001·Biology of Reproduction·M A KhandokerK Hashizume
Nov 3, 2001·Reproduction : the Official Journal of the Society for the Study of Fertility·H F Irving-RodgersR J Rodgers
Jun 4, 2004·Biology of Reproduction·Leigh J ClarkRaymond J Rodgers
Jun 15, 2005·Reproduction, Nutrition, Development·Xochitl HernandezMartine Migaud

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Methods Mentioned

BETA
light microscopy

Software Mentioned

PC System for Image Processing
GraphPad
GraphPad Prism
LUCIA

Related Concepts

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis