The producer can then determine the optimum time for proper artificial insemination. It also drastically reduces labor, as the system does the heat detection for you. However, it is the most expensive heat detection aid available. A producer must have a personal computer, plus purchase or lease the radio receiver and transmitters for each cow. There are several factors that affect estrus detection either favorably or adversely.
Weather is one factor that can have a tremendous effect on estrus detection.
Extreme low or extreme high temperatures can suppress both duration and expression of heat. Artificial insemination should be scheduled for periods when the weather is historically favorable. The cattle need to be as comfortable as possible. An easily readable cow identification is also important. Tags should be free from mud and dirt, and brands should be clipped of long hair.