The Council on Dairy Cattle Breeding (CDCB) is adding gestation length as a new trait to be released with August 2017 proofs.

Gestation length can be most useful as a genetic tool for herds that implement seasonal calving. These herds will have the option of choosing service sires with shorter gestations for cows that didn’t settle to the first breeding.

Gestation length can also be a useful predictor of a cow’s calving date, which allows for more efficient management of close-up and maternity pen moves.

As of now, gestation length will not be included in TPI or the Net Merit index.

As new traits like gestation length are released, it’s important to keep your farm’s current situation and future goals front of mind. Work with your trusted Alta advisor to review your customized genetic plan. Only incorporate new traits like gestation length into your plan when they aid your farm’s goals and bottom line.

Learn more information about the research, heritability, and correlations behind gestation length, as presented by Wright, Van Raden and Hutchison at the 2017 ADSA meetings.