Publications by authors named "Yuka Kumazaki"
A lower nutrient supply from Holstein (HOL) dams to beef fetuses than HOL fetuses has been demonstrated, but the underlying factors remain unclear. We investigated maternal, umbilical vein, and calf blood glucose and amino acid concentrations at calving, along with placental development at term, in HOL dams with similar fetuses (HOL-HOL, n = 12), F1 crosses (HOL × Japanese Black [JB]; HOL-F1, n = 4), JB fetuses (HOL-JB, n = 7), and JB dams with similar fetuses (JB-JB, n = 11). Calf birth weight, total cotyledonary weight, and surface area were greater in HOL-HOL compared to JB-JB or HOL-JB (P < 0.
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- The study focuses on how the growth of heifers and milk production in lactating cows affect the nutrient supply to their fetuses, specifically comparing primiparous (first-time mothers) and multiparous (experienced mothers) cows.
- It was found that while multiparous cows had larger individual cotyledons, the overall nutrient concentrations (glucose and amino acids) supplied to the fetus were lower compared to primiparous cows, indicating an imbalance despite their adaptive changes.
- The research suggests that nutritional management strategies for multiparous cows during pregnancy need to be reevaluated to ensure adequate nutrient supply to their developing fetuses.