This information is from Dr. Les Anderson, a beef extension specialist at the University of Kentucky. We think it is good information and would like to share it with you.
I received this call a couple of weeks ago. I seem to receive calls similar to this one six to eight times each year. This particular rancher had just finished getting his cows diagnosed for pregnancy.
He had 43 falling calving cows. Last fall, these cows were synchronized for artificial insemination and were exposed to one bull for about 5 weeks and a second bull for 7 weeks.