Elevated folate levels in amniotic fluid after oral supplementation.

Area of Science:

• Obstetrics and Gynecology
• Nutritional Science
• Biochemistry

Background:

• Maternal nutrition during pregnancy is crucial for fetal development.
• Folate and vitamin B12 are essential micronutrients with critical roles in cell growth and DNA synthesis.
• Maintaining adequate levels of these vitamins is vital for a healthy pregnancy outcome.

Purpose of the Study:

• To investigate the impact of oral folic acid and vitamin B12 supplementation on folate and vitamin B12 levels in pregnant women.
• To determine the correlation between maternal folate status and amniotic fluid folate concentrations.
• To compare the effects of folic acid versus vitamin B12 supplementation on these parameters.

Main Methods:

• Ten pregnant women received daily oral supplementation of 5 mg folic acid and 1 microgram vitamin B12.
• Ten non-supplemented pregnant women served as controls.
• Folate and vitamin B12 levels were measured in maternal plasma, red blood cells, and midtrimester amniotic fluid.

Main Results:

• Supplemented pregnant women showed significantly higher plasma, red cell, and amniotic fluid folate levels compared to controls.
• Amniotic fluid folate concentrations were consistently lower than maternal plasma and red cell levels.
• A significant positive correlation was observed between maternal plasma folate and amniotic fluid folate (r = 0.72, p < 0.001).
• Vitamin B12 supplementation did not elevate maternal blood or amniotic fluid levels, though amniotic fluid vitamin B12 was higher than plasma levels.

Conclusions:

• Oral folic acid supplementation effectively increases folate levels in maternal plasma, red blood cells, and amniotic fluid during pregnancy.
• Folic acid, but not vitamin B12, supplementation augments folate status in both mother and fetus.
• Maternal plasma folate concentration is a significant predictor of fetal folate status as reflected in amniotic fluid.