Heifer spaying is a management tool with many advantages. For cattlemen unfamiliar with the procedure, here’s a quick review. Spaying female cattle is the surgical removal of the ovaries, or female castration. This removes the primary source of estrogen, the hormone that causes estrus so riding is diminished or eliminated. It also, removes the source of the ova, which combined with sperm cells after mating creates unwanted pregnancies. Spaying heifers maintains stocker and feeder heifers in a neutered status. Spaying also lets us detect early pregnant stocker heifers accidentally bred at a young age.