Complete blood counts (CBC) of umbilical cord blood from 123 healthy term newborns were simultaneously performed with two different cytometers using laser as a light source. Medians (95% range) were: WBC 14.2 (7.8–24.3) × 109/l, platelets 265 (174–363) × 109/l, Hb 15.7 (12.5–18.2) g/dl, RBC 4.6 (3.9–5.5) × 1012/l, MCV 106 (95–113) fl, PCV 0.49 (0.40–0.56), and MCH 33.8 (30.3–36.4) pg. Reticulocytes were 149 (95–212) × 109/l or 3.3 (2.0–4.7)%; erythroblasts 5 (0–24) per 100 WBC or 0.53 (0.00–3.20) × 109/l. The counters agreed well except for MCHC. WBC counts showed the smallest difference irrespective of erythroblast number; platelets showed the largest difference. The lower limit for normal Hb should be fixed at 12.5 g/dl for the adequate diagnosis of anaemia from cord blood of term newborns.

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