Visual aids push timed artificial insemina

摘要

My first use of timed artificial (AI) insemination came immediately after veterinary college. A prostaglandin product had been approved for horses, but it was expensive. By infusing a fraction of the equine dose into the uterus of a cow with a corpusluteurn, it usually could be brought into estrus. Timed insemination has come a long way. Now I visit many farms where reproduction is a limiting factor. Herd records often reveal conception rates between 25 percent and 35 percent with heat detection between 35 percent and 50 percent In past years, these levels would have been seen as unacceptably low, but today they are common, even in well-managed herds. While there might be steps we can take to improve conception rates, we often can make faster progress by using an aggressive timed insemination program to raise the number of inseminations.