EFFECT OF MATERNAL PARITY AND INFANT SEX UPON THE HAEMATOLOGICAL VALUES OF CORD BLOOD

Abstract
Coulter Counter (Model S) analysis of 400 human cord blood samples are presented, together with differential white cell counts for 249. The mean values for Hb and red cell count are somewhat higher than previous values determined by manual methods, those for hematocrit [HCT] and mean cell volume are slightly lower. The red cell count, Hb concentration and HCT are significantly higher in male than in female infants. A parity effect was also demonstrated: infants of both sexes born as 2nd or subsequent births have lower values for total white cell count, Hb concentration and HCT, than 1st-born infants.

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