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...
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| 格式: | masterThesis |
| 語言: | spa |
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2025
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| 在線閱讀: | https://dspace.unl.edu.ec/jspui/handle/123456789/32438 |
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| author | Lasso Acaro, Jefferson Rodrigo |
| author_facet | Lasso Acaro, Jefferson Rodrigo |
| author_role | author |
| collection | Repositorio Universidad Nacional de Loja |
| dc.contributor.none.fl_str_mv | Abad Guamán, Rodrigo Medardo |
| dc.creator.none.fl_str_mv | Lasso Acaro, Jefferson Rodrigo |
| dc.date.none.fl_str_mv | 2025-04-22T22:03:48Z 2025-04-22T22:03:48Z 2025-04-22 |
| dc.format.none.fl_str_mv | 39 p. application/pdf |
| dc.identifier.none.fl_str_mv | https://dspace.unl.edu.ec/jspui/handle/123456789/32438 |
| dc.language.none.fl_str_mv | spa |
| dc.publisher.none.fl_str_mv | Loja |
| dc.rights.none.fl_str_mv | http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ info:eu-repo/semantics/openAccess |
| dc.source.none.fl_str_mv | reponame:Repositorio Universidad Nacional de Loja instname:Universidad Nacional de Loja instacron:UNL |
| dc.subject.none.fl_str_mv | CUERPO LUTEO BOVINOS OVARIOS |
| dc.title.none.fl_str_mv | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| dc.type.none.fl_str_mv | info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/masterThesis |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| id | UNL_cf5f09a4147900cf2b5599f2b5056a0a |
| instacron_str | UNL |
| institution | UNL |
| instname_str | Universidad Nacional de Loja |
| language | spa |
| network_acronym_str | UNL |
| network_name_str | Repositorio Universidad Nacional de Loja |
| oai_identifier_str | oai:dspace.unl.edu.ec:123456789/32438 |
| publishDate | 2025 |
| publisher.none.fl_str_mv | Loja |
| reponame_str | Repositorio Universidad Nacional de Loja |
| repository.mail.fl_str_mv | * |
| repository.name.fl_str_mv | Repositorio Universidad Nacional de Loja - Universidad Nacional de Loja |
| repository_id_str | 0 |
| rights_invalid_str_mv | http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ |
| spelling | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinosLasso Acaro, Jefferson RodrigoCUERPO LUTEOBOVINOSOVARIOSThe 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.La calidad y cantidad de ovocitos bovinos son factores clave para optimizar las tÈcnicas de reproducciÛn asistida, y pueden estar influenciados por la presencia del cuerpo l ̇teo (CL). El objetivo de esta investigaciÛn fue evaluar la relaciÛn entre la presencia del CL y las caracterÌsticas cuantitativas y cualitativas de los ovocitos bovinos recuperados post- mortem, considerando adem·s el estado de gestaciÛn y factores externos como el color del pelaje, Se analizaron ovarios bovinos recolectados en matadero, registrando variables como el peso ov·rico, n ̇mero de folÌculos y caracterÌsticas morfolÛgicas de los complejos c ̇mulo-ovocito (CCOC), clasificados en grados I a IV, Los resultados mostraron que los ovarios con CL presentaron un mayor peso (p ≤ 0,05), sin que se observaran diferencias significativas en la cantidad ni en la calidad de los ovocitos respecto a los ovarios sin CL. En relaciÛn con el estado de gestaciÛn, no se encontraron variaciones significativas en el n ̇mero total de ovocitos; sin embargo, se evidenciÛ una mayor proporciÛn de ovocitos grado III en vacas gestantes y de grado IV en no gestantes (p < 0,05), En cuanto al color del pelaje, se detectaron diferencias en el peso ov·rico, pero no en la cantidad ni en la calidad de los ovocitos, En conclusiÛn, la presencia del cuerpo l ̇teo se asocia con un mayor peso ov·rico, sin afectar la cantidad ni la calidad de los ovocitos recuperados, mientras que el estado de gestaciÛn podrÌa influir en la distribuciÛn por grado de los ovocitos, sin modificar su n ̇mero total.LojaAbad Guamán, Rodrigo Medardo2025-04-22T22:03:48Z2025-04-22T22:03:48Z2025-04-22info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis39 p.application/pdfhttps://dspace.unl.edu.ec/jspui/handle/123456789/32438spahttp://creativecommons.org/licenses/by-nc-sa/3.0/ec/info:eu-repo/semantics/openAccessreponame:Repositorio Universidad Nacional de Lojainstname:Universidad Nacional de Lojainstacron:UNL2025-05-02T15:51:53Zoai:dspace.unl.edu.ec:123456789/32438Institucionalhttps://dspace.unl.edu.ec/Universidad públicahttps://unl.edu.ec/https://dspace.unl.edu.ec/oaiEcuador***opendoar:02025-07-27T13:55:11.317697trueInstitucionalhttps://dspace.unl.edu.ec/Universidad públicahttps://unl.edu.ec/https://dspace.unl.edu.ec/oai*Ecuador***opendoar:02025-07-27T13:55:11.317697Repositorio Universidad Nacional de Loja - Universidad Nacional de Lojatrue |
| spellingShingle | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos Lasso Acaro, Jefferson Rodrigo CUERPO LUTEO BOVINOS OVARIOS |
| status_str | publishedVersion |
| title | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| title_full | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| title_fullStr | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| title_full_unstemmed | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| title_short | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| title_sort | Relación del cuerpo lúteo sobre la calidad y cantidad de ovocitos bovinos |
| topic | CUERPO LUTEO BOVINOS OVARIOS |
| url | https://dspace.unl.edu.ec/jspui/handle/123456789/32438 |