Control ofvitamin D metabolism inpreterminfants: feto-maternal relationships

SUMMARY To assesstherelationship between maternal andfetal mineral homeostasis, serum calcium, magnesium, inorganic phosphate, parathyroid hormone, andvitamin D metabolite concentrations invenous cordserafrom15pretermsingletons and3twinpairs were compared withthe levels foundinmaternal sera.Cordcalcium, magnesium, andphosphorus levels were significantly higher thantherespective levels inmaternal samples. There was a significant relationship between thetwocompartments forallthree analyses. Cordserum 25-hydroxyvitamin