Metabolomic analysis of oviduct fluid on day 3 post-estrus in Holstein heifers

The metabolites in the oviduct fluid (OF) of both oviducts were analyzed by proton nuclear magnetic resonance (1H-NMR) in Holstein heifers on day 3 after synchronized estrus. Twenty-six metabolites were quantified, among which lactate, glycine and myoinositol were the most abundant. Six metabolites including glycine and myoinositol varied in amount according to the proximity to the corpus luteum. Glucose and histidine were among the most variable metabolites among heifers while threonine and lactate were among the most stable ones, suggesting different mechanisms of homeostasis in the OF. (c) 2021 Society for Biology of Reproduction & the Institute of Animal Reproduction and Food Research of Polish Academy of Sciences in Olsztyn. Published by Elsevier B.V. All rights reserved.

Automated summary

Metabolites in the oviduct fluid of Holstein heifers varied in amount based on proximity to the corpus luteum, with some metabolites showing greater variability than others. This suggests different mechanisms of homeostasis in the oviduct fluid in heifers.