Some spring calving herds are starting to gear up for the breeding season by utilizing either natural service, artificial insemination (AI), or a combination of both. According to a recent NAHMS survey, 84.85% of operations utilize natural service only and 10.3% utilizing AI and exposure to bulls. The implementation of estrous synchronization has the potential to shorten your calving window, concentrates labor, allows for more uniform management of cows, and can create a more uniform calf crop.