Nusbaum, M J The content of calcium, magnesium, copper, iron, sodium, and potassium in amniotic fluid from eleven to nineteen weeks' gestation. [electronic resource] - American journal of obstetrics and gynecology Jan 1973 - 219-26 p. digital Publication Type: Journal Article ISSN: 0002-9378 Standard No.: 10.1016/0002-9378(73)90289-5 doi Subjects--Topical Terms: Amniotic Fluid--analysisCalcium--analysisCopper--analysisFemaleGestational AgeHumansIron--analysisMagnesium--analysisPotassium--analysisPregnancyPregnancy Complications--diagnosisSodium--analysis