Is AI straws messed about with?

[Ltec]

Is the AI straws messed about with as in they take sexed semen out of it and leave the rest for normal straws.
Good replacement always ends up a bull and good one for bull calves always ends up heifers.
We've been looking bulls this past 3 years so used a good terminal bull and for 3 years in a row 9 out of 10 of them are heifers.
The chances of that 3 years in a row is slim.
With sexed semen they give you a 9 out of 10 chance to be right which surprisingly tallys up exactly with mine if they are fit to remove the bulls and sell me the rubbish.

 

[jondear]

We don't use sexed .
For quite a while now all our British Friesian are mostly bulls and all our Angus end up heifers .
Does make you wonder what happens with bulls when sex sorted . Don't know might not even work like that!

 

[AGN76]

No.

 

[DocPhil001]

No. The process kills off the male sperm. That is why the conception rate is less as there are less sperm per straw.

 

[daviessw]

No, especially with the new technology they kill the male sperm for the sexed straws so the conventional straws are a mix of the two