Comparative morphological and histochemical studies of ovarian follicles in the goat and sheep
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Keywords:
Goat, Ovarian follicular morphology, Ovarian follicular histology, SheepAbstract
Comparative morphological and histochemical studies have been made of the ovarian follicles in goat and sheep. The difference between the mean follicle diameter of goat nnd sheep ovaries was statistically nonsignificant. The largest antral follicle was 727 µm and 1125 pm in diameter in goat and sheep ovaries, respectively, obtained from slaughterhouses. However, a significant difference was observed between mean oocyte diameters in goat and sheep follicles. Extranucleolar bodies in the oocytcs of growing follicles were of more common occurrence in goat than in sheep ovaries. Few binucleate, biovular and triovular follicles were observed which ultimately undergo atresia. Sequential histochemicnl differences in DNA, RNA, hexose-containing mucopolysaccharides, sulphated mucopolysaccharides, lipids and 3ß-HSDH have been described in different follicle components of goat and sheep ovaries. Accumulation of lipid yolk material in goat occytes was more as compared to sheep oocytes. It was thus concluded that the goat oocytes attained relatively Larger size by accumulating more quantity of biochemical components such as nucleic acids; lipid droplets, etc. in comparison to sheep oocytes. These chemical components may be used during fertilization and embryogenesis.
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