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Semex's Repromax® Sires Work Hard... Time After Time

Trusting Semex and its high fertility Repromax™ sires to get your cows pregnant has never been easier. In the January 2010 Sire Conception Rate (SCR) data published by the USDA, Semex sires scored higher than all other studs in two categories that show real results on real dairies… 5,000 breedings and more and 10,000 breedings and more.

Semex sires achieved the highest average SCR score of any stud in both categories! These results prove that time and time again, Semex sires are working on dairies everywhere, getting cows back in calf faster and making real dairies more profitable with each service.


As the world’s only international fertility evaluation, Repromax™ combines SCR, ATA and Non-Return data. Known as Semex Repromax™ sires, these are highly reliable bulls proven to be high fertility sires with no genetic sacrifices. Semex’s Repromax™ sires are easily identified with the Repromax™ brand in all Semex materials and are included in ProMate™, Semex’s global custom selection index.

For a complete listing or more information on Repromax™ sires, or any of Semex’s growing suite of programs designed to increase real dairy profitability, please visit