References
- Cruikshank D. P., Pitkin R. M., Reynolds W. A., Williams G. A., Hargis G. K. Effects of magnesium sulfate treatment on perinatal calcium metabolism. I. Maternal and fetal responses. Am. J. Obstet. Gynecol. 1979; 134: 243
- Drop L. J., Fuchs C., Stulz P. M. Determination of blood ionized calcium in a large segment of the normal adult population. Clin. Chim. Acta 1978; 89: 503
- Fogh-Andersen N., Christiansen T. F., Komarmy L., Siggaard-Andersen O. Measurement of free calcium ion in capillary blood and serum. Clin. Chem. 1978; 24: 1545
- Ladenson J. H., Bowers G. N., Jr. Free calcium in serum. I. Determination with the ion-specific electrode and factors affecting the results. Clin. Chem. 1973; 19: 565
- Larsson L., Ohman S. Serum calcium ion activity. Some aspects on methodological differences and intraindividual variation. Clin. Biochem. 1979; 12(4): 138
- Lin C., Moawad A. H., Rosenow P. J., River P. Fetus, placenta and newborn. Acid-base characteristics of fetus with intrauterine growth retardation during labor and delivery. Am. J. Obstet. Gynecol. 1980; 137: 553
- Livnat E. J., Fejgin M., Scommegna A., Bieniarz J., Burd L. Neonatal acid-base balance in spontaneous and instrumental vaginal deliveries. Am. J. Obstet. Gynecol. 1978; 52 (5): 549
- Moore E. W. Ionized calcium in normal serum, ultrafiltrates, and whole blood determined by ion-exchange electrodes. J. clin. Invest. 1970; 49: 318
- Pitkin R. M., Cruickshank D. P., Schauberger C. W., Reynolds A. W., Gerald A. W., Hargis G. K. Fetal calcitropic hormones and neonatal calcium homeostasis. Pediatrics 1980; 66: 77
- Reitz R. E., Daane T. A., Woods J. R., Weinstein R. L. Calcium, magnesium, phosphorus, and parathyroid hormone interrelationships in pregnancy and newborn infants. Obstet. Gynecol. 1977; 50: 701
- Ross J. W. Calcium-selective electrode with liquid ion-exchanger. Science 1967; 156: 1378
- Shami Y., Radde I. C. Calcium stimulated ATPase of guinea pig placenta. Biochem. Biophys. Acta 1971; 249: 345
- Steichen J. J., Tsang R. C., Gratton T. L., Hamstra A., Deluca H. F. Vitamin D homeostasis in the perinatal period. 1.25-dihydroxyvitamin D in maternal, cord and neonated blood. New Engl. J. Med. 1980; 302: 315
- Willis J. B. The determination of calcium and magnesium in urine by atomic absorption spectroscopy. Anal. Chem. 1961; 33: 556