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Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 2006;19(12): 1711-1715.
DOI: https://doi.org/10.5713/ajas.2006.1711    Published online September 29, 2006.
Morphological Criteria of Bovine Ovaries for Predicting Retrieval Efficiency of Preantral Follicles
Moon Hwan Choi, Ji Hwan Oh, Tae Min Kim, Jae Yong Han, Jeong Mook Lim
To predict the number of preantral (primordial, primary and secondary) follicles retrieved from bovine ovaries, we examined the relationship between morphological parameters of ovaries and number of preantral follicles retrieved mechanically. The preantral follicles were retrieved mechanically by slicing ovarian tissue and the influences of size of the ovaries, number of antral follicles, and presence of cystic follicle and corpus luteum on the retrieval were evaluated. Total 77 ovaries were used and significant (p<0.05) relationship was detected between the number of antral follicles and the presence of cystic follicles, and the retrieval number. More preantral follicles were retrieved from the ovaries having more than 20 antral follicles than those having less than 20 antral follicles (17,760??,637 vs. 3,689??37) in the ovarian cortex. The retrieval number was significantly reduced in cystic ovaries compared with non-cystic ovaries (5,167??25 vs. 20,631??,507). However, neither ovary size (<3.5, 3.5 to 4.0, 4.0 to 4.5 and >4.5 cm) nor the presence of corpus luteum affected the follicle retrieval. In conclusion, the number of preantral follicles retrieved from the ovaries can simply be predicted by the number of antral follicles and the presence of cystic follicles in the ovarian cortex.
Keywords: Bovine; Ovary; Preantral and Antral Follicle; Retrieval, Atresia
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