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

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 inseminatio

SUBMITTER: Yi J 

PROVIDER: S-EPMC9122465 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature