[Effect of vitamin/mineral supplementation on calcium, magnesium and iron levels in amniotic fluid and serum taken from women during first half of pregnancy].

The levels of calcium, magnesium and iron in amniotic fluid and serum taken from women during first half of pregnancy were compared. The relationship between these levels and vitamin-mineral supplementation was also estimated. There was similar calcium and magnesium concentration in the serum and amniotic fluid. The concentration of iron in serum was four times as large as in amniotic fluid. Any influence of supplementation on concentration of studied minerals was noted.