Up to 90% heifer calves claim

SEXED semen has been improved, with better sexing techniques, additional quality controls, and an improved freezing system.

Conception rates on a par with conventional semen are now claimed, resulting in between 60% and 90% of heifer calves being born — with conception claims depending on the company marketing it.

AI companies say using sexed semen could make for easier calving — by producing heifers from heifers.