Seasonal variation of the estrous cycle length, corpus luteum area, and size of the pre-ovulatory follicle in Criollo Limonero heifers
| Autor: | Belkys Bracho-Bravo, Thaís Díaz, Antonio Landaeta-Hernández, Armando Moreno-Quintero, Louis F. Archbald, Merilio Montero-Urdaneta, Sunny A Zambrano-Nava, Marcelo . Gil-Araujo, Germán Portillo-Martínez |
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| Rok vydání: | 2020 |
| Předmět: |
Ovulation
media_common.quotation_subject Estrous Cycle Biology Animal science Food Animals Ovarian Follicle Corpus Luteum medicine Animals Progesterone media_common Estrous cycle Ovulatory follicle Ovary Repeated measures design Seasonality medicine.disease medicine.anatomical_structure Criollo tobacco Animal Science and Zoology Cattle Female Analysis of variance Seasons Reproduction Corpus luteum |
| Zdroj: | Tropical animal health and production. 53(6) |
| ISSN: | 1573-7438 |
| Popis: | In order to determine whether seasonal variations may influence the estrous cycle length (ECL), corpus luteum size (CLS), maximum area of CL (MACL), day of cycle with maximum area of CL (DCMACL), and pre-ovulatory follicles size (PFS), ten Criollo Limonero heifers were subjected to daily ultrasound ovary scanning throughout their estrous cycles during three seasons: hot-dry (HD), hot-humid (HH), and wind-rain (WR). The effect of season on ECL, MACL, DCMACL, and PFS was analyzed with an ANOVA (PROC GLM, SAS), whereas, for the effect of season on CLS, an ANOVA with repeated measures (PROC MIXED, SAS) was used. Results showed no effect (P > 0.05) of season on ECL, MACL, and DCMACL. However, size of PFS was larger (P |
| Databáze: | OpenAIRE |
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