Received: 17-04-2023
Accepted: 29-08-2023
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Factors Related to Quantity And Quality of OocytesCollectedfromAbattoir Bovine Ovaries
,
Vu Minh Lam
1
,
Nguyen Duc Truong
1
,
Nguyen Hoai Nam
1
,
Do Thi Kim Lanh
1
Keywords
Body condition score, bovine ovary, oocyte quantity and quality
Abstract
The study was conducted to evaluate the influence of breed, body condition score (BCS- Body condition scores), ovary volume and the largest follicle size on some parameters related to the number and quality of bovine oocytes (classify as A, B level were good oocytes and C, D level were not good oocytes). The results showed that there was no significant difference on the average number of follicles on the ovary surface, the number of oocytes obtained, and the ovary volume between the cattle breeds but the average mass of follicles/ovary. Specifically, the average volume of follicles/ovary in Yellow cattles (6.11g) was higher than in Dairy cattles (2.66g, P <0.05). BCS did not affect the mean follicle size, mass, and the total number of follicle obtained. Ovarian mass, the largest follicle size had an influence on the total number of follicles and the number of oocytes obtained. Ovaries with a mass of 5-10g having the average total number of follicles, the total number of A, B and C, D follicles accounted for the highest number (11.21 follicles; 3.9 and 6.51 oocytes). Similarly, the number of A-B and C-D oocytes obtained from the ovary with the largest follicle size ranged 3-7mm were 4.06 and 7.09, respectively (P <0.005).
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