Pregnancy influences on the rumen environment of Angus heifers differing in feed efficiency - Martin, M. Gabbi; Henniger, Madison T.; Clemmons, Brooke A.; Ault-Seay, Taylor B.; Cordero, Juan F.; Voy, Brynn H.; McLean, Kyle J.; Mulon, Pierre-Yves; Anderson, David E.; Myer, Phillip R. (Frontiers in Animal Science, 2024)