dairy semen sexing. sexed semen.

[ThunderIdeal]

Got your attention eh? That's what its called though.

An emerging practise which reduces the likelihood of dairy cows producing tragically unwanted male offspring (bobby calves).

[kapitän kamasutra]

I think 'male' semen has slightly lower mass than 'female' because the y is smaller than the x. Might be the trick to tell them appart.

[Auxin]

Well I'm glad you specified you meant animal husbandry, my state recently outlawed the other kind of dairy sexing.