Maternal magnesium intake and pregnancy outcome

Area of Science:

• Obstetrics and Gynecology
• Nutritional Science
• Perinatal Medicine

Background:

• Maternal nutrition significantly impacts pregnancy outcomes.
• Magnesium is an essential mineral with potential roles in fetal development.
• Understanding nutrient-specific influences during pregnancy is crucial for optimizing infant health.

Purpose of the Study:

• To investigate the association between maternal magnesium intake and key birth parameters.
• To determine the optimal level of magnesium intake for favorable pregnancy outcomes.
• To explore the critical window of magnesium's influence during gestation.

Main Methods:

• Dietary records of 513 pregnant women were analyzed for magnesium intake in the first trimester.
• Correlations were assessed between magnesium intake and birth weight, length, head circumference, and gestational length.
• A subsample received magnesium supplementation during the second and third trimesters to evaluate later-stage effects.

Main Results:

• Maternal magnesium intake showed significant correlations with birth weight, length, and head circumference up to a threshold of 3200g.
• Magnesium was the third most significant element, after sodium and chloride, associated with these pregnancy outcomes.
• Supplementation in the second and third trimesters did not affect pregnancy outcomes, suggesting a first-trimester or pre-conception influence.

Conclusions:

• Maternal magnesium intake during early pregnancy is associated with optimal fetal growth and development.
• An intake of approximately 300 mg/day of magnesium appears compatible with ideal birth weight, length, and head circumference.
• The critical period for magnesium's influence on these parameters seems to be the first trimester or prior to conception.