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CALCIUM AND PHOSPHORUS CONTENT OF TRANSITIONAL AND MATURE HUMAN MILK

Abstract. Barltrop, D. and Hillier, R. (Paediatric Unit, St. Mary's Hospital Medical School, London, England). Calcium and phosphorus content of transitional and mature human milk. Acta Paediatr Scand 63: 347, 1974.–The mineral content of breast milk is known to vary but the significance of this for the newborn is unknown. The calcium and phosphorus content of breast milk from 58 nursing mothers has been determined at intervals up to 6 weeks post partum. The plasma calcium and phosphorus content of 15 of the infants aged 6 days was also measured. The calcium and phosphorus content of transitional milk increased during the first 6 days of lactation without significant alteration in Ca/P ratio. No relationship between milk composition and infant plasma chemistry could be demonstrated at the 6th day. The data suggest that milk Ca/P ratios are of less significance for neonatal calcium homeostasis at low as opposed to high mineral loads.