Polyunsaturated fatty acids (PUFA), particularly omega-3 fatty acids, play a crucial role in various body functions related to reproduction, health, and growth in livestock. This study focused on supplementing omega-3 fatty acids to first-calf beef heifers during the last trimester of gestation. The results showed that omega-3 supplementation had a positive impact on immunoglobulin G (IgG) concentration in colostrum and offspring circulation, indicating improved maternal antibody transfer. Although calf growth was unaffected from birth to weaning, calves from omega-3-supplemented first-calf heifers were 6 kg heavier by the end of the early growth period and kept this advantage later on during the feedlot receiving period. This suggests that incorporating omega-3 fatty acids into the diet of pregnant first-calf heifers could be a practical strategy to enhance maternal antibody transfer through colostrum and improve offspring growth in beef production systems.

Read the full article in the Journal of Animal Science.