Hi, I’m new to AI’ing and I’ve been using different Holstein sires from various AI companies over the past year and a half and I’m seeing big variations in conception rates to different bulls and was wondering is this common?
For example I’ve used 30 conventional straws from one bull with over 20 confirmed pregnancies and yet there’s another bull that I’ve used 30 conventional straws from with only 10 confirmed pregnancies.
Is this common or is it just bad luck for the latter of the two bulls?
I also seem to get higher conception rates with certain sexed bulls than I do with other conventional bulls straws
Thanks in advance for any replies!
For example I’ve used 30 conventional straws from one bull with over 20 confirmed pregnancies and yet there’s another bull that I’ve used 30 conventional straws from with only 10 confirmed pregnancies.
Is this common or is it just bad luck for the latter of the two bulls?
I also seem to get higher conception rates with certain sexed bulls than I do with other conventional bulls straws
Thanks in advance for any replies!