Build Cows that Stay: Smarter Heifer Development for Long-Term Productivity

Jul 03, 2026

By Kacie McCarthy and T.L. Meyer

Setting replacement heifers up for cowherd longevity is more than achieving a first pregnancy. It requires building females that remain productive within the constraints of their production environment (forage resources, climate, and management).

Research across a range of development systems demonstrates that similar pregnancy rates can often be achieved under both traditional and extensive management programs. This suggests producers have flexibility to reduce development inputs while maintaining acceptable reproductive outcomes. However, one factor consistently drives long-term success: early conception during the first breeding season.

Early Conception: The Foundation of Longevity

Heifers that conceive within the first 21 days of their initial breeding season calve earlier, have more time to recover postpartum, and remain in the herd longer. These females also wean more pounds of calf over their lifetime compared to later-conceiving counterparts. As a result, early conception is one of the most important predictors of lifetime productivity and retention.

While early conception is critical, achieving it depends on how well the heifer development program aligns with the production environment.

Source : unl.edu

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Elanco is working alongside the U.S. animal health industry to help them fight against this parasite, offering a portfolio of options for pets and livestock that can help treat New World screwworm larvae infestations.