Differences in hormone levels around parturition in Hanwoo cattle (Bos taurus coreanae) following artificial insemination and embryo transfer.
Vet Med Sci
; 8(3): 1258-1263, 2022 05.
Article
em En
| MEDLINE
| ID: mdl-35193169
ABSTRACT
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.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Progesterona
/
Prolactina
Limite:
Animals
/
Female
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Humans
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Pregnancy
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article