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Factors controlling nutrient availability to the developing fetus in ruminants.

Kathrin A Dunlap1, Jacob D Brown1, Ashley B Keith1

  • 1Department of Animal Science, Texas A&M University, 2471 TAMU, College Station, Texas 77843 USA.

Journal of Animal Science and Biotechnology
|April 25, 2015
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Summary

Maternal nutrition significantly impacts placental development and function, affecting fetal growth in ruminants. Understanding these factors is crucial for preventing intrauterine growth restriction (IUGR) and improving neonatal health in livestock.

Keywords:
Intrauterine growth restrictionNutrient transportPlacentaRuminant

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Area of Science:

  • Reproductive Physiology
  • Animal Nutrition
  • Developmental Biology

Background:

  • Intrauterine growth restriction (IUGR) is a major cause of livestock mortality, often linked to inadequate nutrient delivery to the fetus.
  • Ruminants, particularly those on forage-based diets, are vulnerable to nutritional deficiencies during pregnancy.
  • Fetal nutrient supply relies on placental development, blood flow, and transport capacity.

Purpose of the Study:

  • To review the critical role of maternal nutrition in regulating placental form and function.
  • To highlight the impact of nutrition on placental development and its consequences for fetal growth in ruminants.
  • To emphasize the importance of amino acids and their transporters in fetal development.

Main Methods:

  • This review synthesizes existing research on maternal nutrition and placental function in ruminants.
  • It examines the physiological mechanisms linking nutrient availability to placental development and nutrient transport.
  • Key findings from laboratory studies and field observations are integrated.

Main Results:

  • Maternal nutrition directly influences placental growth, vascularization, and metabolic activity.
  • Amino acid availability and transport systems are essential for adequate fetal nutrient supply.
  • Nutritional deficiencies can impair placental function, leading to IUGR.

Conclusions:

  • Maternal nutrition is a key determinant of placental function and fetal development in ruminants.
  • Optimizing nutrition can mitigate IUGR and improve neonatal outcomes in livestock.
  • Further research into nutrient-placental-fetal interactions is warranted.