I have not used sexed semen in my herd, but I have read several articles about it. most if not all confirm that sexed semen has lower conception rates and are around 90% accurate on sex of offspring. cost is usually double the cost of unsexed semen. my thinking is that every cow I have is good enough to keep a replacement out of if she has a heifer calf. if she isn't, she should be on the cull list. If my favorite cow has 2 calves in her lifetime, the chances are just as good she will have a heifer or bull (depending on which sex you want) calf as if I used sexed semen. I could see using it if you are just starting out and want replacements from your own herd to expand more rapidly but other that that, sexed semen is a negative to me because of the lower conception rate. I am sure others use it regularly and are completely happy with it.