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GENEX is your exclusive source for fertility rankings on sires when used as part of a synchronization program - SynchCheck

Research has shown that sire fertility levels differ when used in synchronization breeding programs. In fact, there can be up to a 3% increase in conception rate of some bulls when bred to synchronized females.

How to use SynchCheck™ fertility rankings: SynchCheck fertility rankings are set to a 100 base system, meaning a value of 100 is average. Every one point difference is equivalent to a 1% difference in conception rate. For example, if bull A has a 102 SynchCheck and bull B has a 100 SynchCheck, bull A is predicted to be 2% higher in conception rate than bull B.

Find SynchCheck fertility rankings for Holsteins online.


Rely on GENEX sires with
high SynchCheck
fertility rankings to
consistently create pregnancies when
used in synchronized breeding programs.