At birth, there is a leukocytosis of 18,000-22,000/ mm3 (18-22 Ч 109/L) for the first 1-3 days. This drops sharply at 3-4 days to levels between 8,000 and 16,000/mm3. At roughly 6 months, approximately adult levels are reached, although the upper limit of normal is more flexible. Although the postnatal period is associated with neutrophilia, […]