Transrectal ultrasonography of follicular dynamics and early pregnancy in mares: an on-site visual reference

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-09-15T00:30:16Z
Fecha de publicación2026-01-01
ResumenThis study aimed to characterize ovarian follicular dynamics and to describe the ultrasonographic features of early to after-gestation in mares under extensive field conditions. A total of 100 clinically healthy Spanish-type mares, averaging 8 ± 0.7 years of age and 500 ± 50 kg in body weight, were monitored over a 730-day period in three rural locations in Tamaulipas, Mexico. Transrectal ultrasonography was performed daily across a full estrous cycle (~21 days) to assess follicular development in non-pregnant mares. For mares confirmed pregnant 15 days post-mating, five ultrasound evaluations were conducted between days 15 and 150 of gestation. A total of 500 follicular and 500 gestational ultrasonographic images were obtained. Follicles were classified into three groups by diameter: 8–20 mm (n = 250; 50.0%), 21–30 mm (n = 150; 30.0%), and 32–45 mm (n = 100; 20.0%), with mean diameters of 13.7 mm, 25.4 mm, and 39.7 mm, respectively. The mean number of follicles per mare was 5.0, reflecting typical follicular activity during one estrous cycle under tropical field conditions. Gestational scans were distributed as follows: days 15–28 (n = 167; 33.4%; mean age: 21.9 d), days 30–45 (n = 166; 33.2%; mean age: 38.8 d), and days 50–150 (n = 167; 33.4%; mean age: 75.1 d). Key gestational features, such as the embryonic vesicle, heartbeat, and fetal skeleton, were documented per stage. In conclusion, structured ultrasonographic benchmarks for assessing follicular and gestational stages in mares were provided, offering practical tools for reproductive monitoring in field conditions.es_ES
Doihttps://doi.org/10.3897/ejfa.2026.165582es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/2229
Idiomaeses_ES
EditorialPensoft Publisherses_ES
RelaciónEmirates Journal of Food and Agriculturees_ES
URL relacionadohttps://doi.org/10.3897/ejfa.2026.165582es_ES
DerechosAcceso abierto (PDF local verificado)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuenteEmirates Journal of Food and Agriculture
TítuloTransrectal ultrasonography of follicular dynamics and early pregnancy in mares: an on-site visual referencees_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorQuintero-Elisea, Juan Alberto
AutorVelázquez-Morales, José Vicente
AutorOlguin-Arredondo, Hector Armando
AutorPrado-Rebolledo, Omar Francisco
AutorGarcía-Casillas, Arturo César
AutorHernández-Rivera, Juan Augusto
AutorQuintero-Elisea, Juan Albertoes_ES
AutorVelázquez-Morales, José Vicentees_ES
AutorOlguin-Arredondo, Hector Armandoes_ES
AutorPrado-Rebolledo, Omar Franciscoes_ES
AutorGarcía-Casillas, Arturo Césares_ES
AutorHernández-Rivera, Juan Augustoes_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Rango de páginas1-8es_ES
URL relacionadahttps://doi.org/10.3897/ejfa.2026.165582
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen38es_ES

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