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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
07/11/2022 |
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Actualizado : |
07/11/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
DUVAL, L.H.; RECHSTEINER, S.M.F.; GASTAL, G.D.A.; GASTAL, M.O.; MATTOS, R.C.; GASTAL, E.L. |
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Afiliación : |
LUZIA H. DUVAL, Postgraduate Program in Animal Medicine: Equine, Faculty of Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; SANDRA M. FIALA RECHSTEINER, Postgraduate Program in Animal Medicine: Equine, Faculty of Veterinary Medicine, Federal University Rio Grande do Sul, Rio Grande do Sul, Porto Alegre, Brazil; HISTOREP, Biology Institute, Federal University of Pelotas, Rio Grande do Sul, Pelotas, Brazi; GUSTAVO DESIRE ANTUNES GASTAL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MELBA O. GASTAL, Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, United States; RODRIGO C. MATTOS, Postgraduate Program in Animal Medicine: Equine, Faculty of Veterinary Medicine, Federal University of Rio Grande do Sul, Rio Grande do Sul, Porto Alegre, Brazil; EDUARDO L. GASTAL, Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, United States. |
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Título : |
Ovarian and uterine dynamics during the estrous cycle in Criollo breed mares. |
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Fecha de publicación : |
2022 |
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Fuente / Imprenta : |
Journal of Equine Veterinary Science, 2022, Volume 118, Article 104131. doi: https://doi.org/10.1016/j.jevs.2022.104131 |
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ISSN : |
0737-0806 |
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DOI : |
10.1016/j.jevs.2022.104131 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 12 July 2022; Received in revised form 16 September 2022; Accepted 26 September 2022; Available online 29 September 2022.
Correspondence author: Gastal, E.L.; Animal Science, School of Agricultural Sciences, Southern Illinois University, 1205 Lincoln Drive, MC 4417, Carbondale, IL, United States; email:egastal@siu.edu -- |
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Contenido : |
ABSTRACT.- After having been brought to America 400 years ago, the Criollo horse reproduced freely for centuries in the southern part of the American continent. Roughness, resistance, and endurance are typical characteristics of this breed of horses. Although the natural selection that occurred over the centuries may have positively influenced the fertility and longevity of this breed, information regarding ovarian function and other reproductive aspects of Criollo breed mares under natural or controlled management conditions is scarce. The objectives of the present study were to (1) characterize the follicular dynamics of Criollo breed mares, (2) characterize growth and regression of the corpus luteum, and (3) study the cervical and uterine tone and ultrasonographic echotexture changes during two consecutive estrous cycles. In this study, 26 interovulatory intervals (IOI) were evaluated in 13 mares. Spontaneous estrous cycles were characterized by the following: (1) the IOI length was 21 days; (2) dominant and subordinate follicles emerged together at day 5 (ovulation = day 0), and their growth rates were slower until the day of deviation; (3) the deviation in growth rates between the two largest follicles of the ovulatory wave occurred when the dominant and subordinate follicles reached 22 and 21 mm in diameter, respectively; (4) the mean diameter of the preovulatory follicle at the day before ovulation was 43 mm; (5) different combinations of follicular waves were observed in each interovulatory interval; (6) the corpus luteum reached its maximum diameter about 2 days after ovulation and decreased gradually afterward; (7) after ovulation, the cervical and uterine tones were positively correlated and remained elevated until the onset of the expected luteolysis (days 12?14); and (8) after the expected luteolysis, the endometrial echotexture started to increase and reached maximum values 5?3 days before ovulation, when it started to decrease. Moderate-to-strong positive correlations between IOIs revealed repeatability within animals for the diameter of the preovulatory follicle at maximum and at the day before ovulation, cervical and uterine tones, endometrial echotexture, and corpus luteum diameter. The findings herein presented are of fundamental importance for a better understanding of the reproductive physiological patterns of the estrous cycle in the Criollo breed mare. © 2022 Elsevier Inc. MenosABSTRACT.- After having been brought to America 400 years ago, the Criollo horse reproduced freely for centuries in the southern part of the American continent. Roughness, resistance, and endurance are typical characteristics of this breed of horses. Although the natural selection that occurred over the centuries may have positively influenced the fertility and longevity of this breed, information regarding ovarian function and other reproductive aspects of Criollo breed mares under natural or controlled management conditions is scarce. The objectives of the present study were to (1) characterize the follicular dynamics of Criollo breed mares, (2) characterize growth and regression of the corpus luteum, and (3) study the cervical and uterine tone and ultrasonographic echotexture changes during two consecutive estrous cycles. In this study, 26 interovulatory intervals (IOI) were evaluated in 13 mares. Spontaneous estrous cycles were characterized by the following: (1) the IOI length was 21 days; (2) dominant and subordinate follicles emerged together at day 5 (ovulation = day 0), and their growth rates were slower until the day of deviation; (3) the deviation in growth rates between the two largest follicles of the ovulatory wave occurred when the dominant and subordinate follicles reached 22 and 21 mm in diameter, respectively; (4) the mean diameter of the preovulatory follicle at the day before ovulation was 43 mm; (5) different combinations of follicular waves were observe... Presentar Todo |
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Palabras claves : |
Cervix and uterus; Follicle and corpus luteum dynamics; Horse; Ultrasound. |
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Asunto categoría : |
L10 Genética y mejoramiento animal |
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Marc : |
LEADER 03612naa a2200265 a 4500
001 1063705
005 2022-11-07
008 2022 bl uuuu u00u1 u #d
022 $a0737-0806
024 7 $a10.1016/j.jevs.2022.104131$2DOI
100 1 $aDUVAL, L.H.
245 $aOvarian and uterine dynamics during the estrous cycle in Criollo breed mares.$h[electronic resource]
260 $c2022
500 $aArticle history: Received 12 July 2022; Received in revised form 16 September 2022; Accepted 26 September 2022; Available online 29 September 2022. Correspondence author: Gastal, E.L.; Animal Science, School of Agricultural Sciences, Southern Illinois University, 1205 Lincoln Drive, MC 4417, Carbondale, IL, United States; email:egastal@siu.edu --
520 $aABSTRACT.- After having been brought to America 400 years ago, the Criollo horse reproduced freely for centuries in the southern part of the American continent. Roughness, resistance, and endurance are typical characteristics of this breed of horses. Although the natural selection that occurred over the centuries may have positively influenced the fertility and longevity of this breed, information regarding ovarian function and other reproductive aspects of Criollo breed mares under natural or controlled management conditions is scarce. The objectives of the present study were to (1) characterize the follicular dynamics of Criollo breed mares, (2) characterize growth and regression of the corpus luteum, and (3) study the cervical and uterine tone and ultrasonographic echotexture changes during two consecutive estrous cycles. In this study, 26 interovulatory intervals (IOI) were evaluated in 13 mares. Spontaneous estrous cycles were characterized by the following: (1) the IOI length was 21 days; (2) dominant and subordinate follicles emerged together at day 5 (ovulation = day 0), and their growth rates were slower until the day of deviation; (3) the deviation in growth rates between the two largest follicles of the ovulatory wave occurred when the dominant and subordinate follicles reached 22 and 21 mm in diameter, respectively; (4) the mean diameter of the preovulatory follicle at the day before ovulation was 43 mm; (5) different combinations of follicular waves were observed in each interovulatory interval; (6) the corpus luteum reached its maximum diameter about 2 days after ovulation and decreased gradually afterward; (7) after ovulation, the cervical and uterine tones were positively correlated and remained elevated until the onset of the expected luteolysis (days 12?14); and (8) after the expected luteolysis, the endometrial echotexture started to increase and reached maximum values 5?3 days before ovulation, when it started to decrease. Moderate-to-strong positive correlations between IOIs revealed repeatability within animals for the diameter of the preovulatory follicle at maximum and at the day before ovulation, cervical and uterine tones, endometrial echotexture, and corpus luteum diameter. The findings herein presented are of fundamental importance for a better understanding of the reproductive physiological patterns of the estrous cycle in the Criollo breed mare. © 2022 Elsevier Inc.
653 $aCervix and uterus
653 $aFollicle and corpus luteum dynamics
653 $aHorse
653 $aUltrasound
700 1 $aRECHSTEINER, S.M.F.
700 1 $aGASTAL, G.D.A.
700 1 $aGASTAL, M.O.
700 1 $aMATTOS, R.C.
700 1 $aGASTAL, E.L.
773 $tJournal of Equine Veterinary Science, 2022, Volume 118, Article 104131. doi: https://doi.org/10.1016/j.jevs.2022.104131
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