Early Asymmetry of the Horns.

Early Asymmetry of the Horns.
The earliest presumptive diagnosis of pregnancy by transrectal palpation can be made on the basis of asymmetry of the horns and the presence of fluid in the larger horn on the side of a fully developed corpus luteum. This is particularly valid in heifers. This is an image of a 32-day gravid uterus.

Drost M (1982)