Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos

The quality and quantity of bovine oocytes are key factors for optimizing assisted reproductive techniques and may be influenced by the presence of the corpus luteum (CL). The aim of this study was to evaluate the relationship between CL presence and the quantitative and qualitative characteristics of bovine oocytes recovered post-mortem, also considering pregnancy status and external factors such as coat color. Bovine ovaries were collected from a slaughterhouse, recording variables such as ovarian weight, number of follicles, and morphological characteristics of cumulus–oocyte complexes (COCs), which were classified into grades I to IV. The results showed that ovaries with CL had a significantly higher weight (p ≤ 0.05), although no significant differences were observed in the quantity or quality of oocytes compared to ovaries without CL. Regarding pregnancy status, no significant differences were found in the total number of oocytes; however, a higher proportion of grade III oocytes was observed in pregnant cows and grade IV in non-pregnant cows (p < 0.05). As for coat color, differences were detected in ovarian weight, but not in oocyte quantity or quality. In conclusion, the presence of the corpus luteum is associated with increased ovarian weight without affecting the number or quality of recovered oocytes, while pregnancy status may influence oocyte grade distribution without altering total oocyte count.

• Prif Awdur: Lasso Acaro, Jefferson Rodrigo (author)
• Fformat: masterThesis
• Iaith: spa
• Cyhoeddwyd: 2025
• Pynciau: CUERPO LUTEO; BOVINOS; OVARIOS
• Mynediad Ar-lein: https://dspace.unl.edu.ec/jspui/handle/123456789/32438