Cargando…

Differences in hormone levels around parturition in Hanwoo cattle (Bos taurus coreanae) following artificial insemination and embryo transfer

BACKGROUND: With unique genetic traits, Hanwoo cattle (Bos taurus coreanae) are well‐adapted to the Korean environment. However, their perinatal mortality rate is 2%–3%, which imposes an economic burden. OBJECTIVE: Due to insufficient data on hormonal changes around parturition, the timing of partur...

Descripción completa

Detalles Bibliográficos
Autores principales: Yi, Junkoo, Yum, Soo‐Young, Kim, Daehyun, Han, Sera, Ha, Jaejung, Kim, Jisu, Jung, Daejin, Jang, Goo, Lee, Wonyou, Moon, Joonho
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9122465/
https://www.ncbi.nlm.nih.gov/pubmed/35193169
http://dx.doi.org/10.1002/vms3.777
Descripción
Sumario:BACKGROUND: With unique genetic traits, Hanwoo cattle (Bos taurus coreanae) are well‐adapted to the Korean environment. However, their perinatal mortality rate is 2%–3%, which imposes an economic burden. OBJECTIVE: Due to insufficient data on hormonal changes around parturition, the timing of parturition is often predicted subjectively; few studies have examined hormones in Hanwoo cattle. We measured the changes in various hormones around parturition, to seek an objective predictor of parturition time. METHODS: In 14 female Hanwoo cattle, we measured progesterone, prolactin and cortisol concentrations daily in jugular vein blood samples, beginning 6 days before parturition until 7 days after parturition. Conception was induced in five animals using artificial insemination. Nine animals received embryo transfer. RESULTS: During parturition, the concentration of progesterone decreased significantly in the embryo transfer group (n = 9) and in the total population (n = 14); it did not change significantly in the artificial insemination group (n = 5). Prolactin concentration increased on the day of parturition but did not differ significantly among the groups. Cortisol remained constant throughout the study course. CONCLUSION: We concluded that parturition time can be predicted in Hanwoo cattle using progesterone concentration. This knowledge can reduce perinatal mortality, which would help to improve farm income and animal welfare.