Keeping Cows Pregnant Through the Summer

Keeping Cows Pregnant Through the Summer

Dr. Justin Rhinehart

University of Tennessee

In normal situations where the bull is fertile and covers cows at the right time, fertilization rates approach 100%. So, if a normally expected single-service conception rate is 60-80%, the difference comes from embryonic or fetal loss. Most of this loss occurs in the first few days of development and those cows or heifers come back in heat and get another opportunity to get settled 19-24 days later. Missing one cycle means that cow’s calf will be younger and lighter at weaning. But, losing a pregnancy after they pass over as heat cycle compounds the economic loss.

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