Pregnancy rate improves when you use visual heat detection and timed AI, says research from
Some people believe that timed AI programs don't work very well in heifers, says Carlos Risco, of the
However, research conducted in
With the use of OvSynch for timed AI, you give a shot of GnRH on day one, a shot of prostaglandin on day seven, a second shot of GnRH on day nine, and then you breed 16 to 20 hours later. However, any heifer that shows visual signs of heat after the prostaglandin shot should be bred that day. Heifers that don't show visual signs of heat should continue on with timed AI, and are bred on day 10.
When you use visual heat detection and timed AI together, says Risco, pregnancy rate improves when compared to breeding on detected heat alone without the use of OvSynch.
Source: Carlos Risco,