Trace elements in the fetal and neonate ruminant: a review

Area of Science:

• Reproductive biology
• Animal nutrition
• Trace element metabolism

Background:

• The placenta plays a crucial role in nutrient transfer to the developing fetus.
• Specific trace elements are vital for fetal development and neonatal health in ruminants.
• Maternal nutrition significantly impacts fetal well-being and offspring viability.

Purpose of the Study:

• To review the placental transfer and localization of selenium, iron, iodine, and zinc in the ruminant fetus.
• To discuss the consequences of inadequate maternal supply of these elements during gestation.
• To highlight the importance of essential trace elements for fetal and neonatal health in sheep and cattle.

Main Methods:

• Literature review of studies on placental transfer of Se, Fe, I, and Zn in ruminants.
• Synthesis of existing data on element localization within the fetal tissues.
• Discussion of the clinical and physiological problems associated with elemental deficiencies.

Main Results:

• Detailed description of the placental transfer pathways for Se, Fe, I, and Zn.
• Identification of key fetal tissues where these elements accumulate.
• Correlation between maternal deficiency and adverse outcomes in fetuses and neonates.

Conclusions:

• Placental transfer of Se, Fe, I, and Zn is critical for ruminant fetal development.
• Deficiencies in these elements during gestation lead to significant health issues for offspring.
• Optimizing maternal nutrition with essential trace elements is vital for successful pregnancy and healthy neonates.