Calcium Concentrations in Maternal and Fetal Blood and in Amniotic Fluid from Pregnant Rats

Abstract

Total and ionic calcium concentrations in maternal and fetal blood and amniotic fluid from normal rat pregnancy were determined. Total calcium concentrations in maternal and fetal blood fluctuated during gestation, while the ionic calcium concentrations were of almost constant level, being 1.19∼1.26 mmol/l in maternal blood and 1.60∼1.67 mmo1/1 in fetal one. The role of non-ionic calcium and amniotic calcium in relation to the constant ionic calcium level was discussed.