Table 2.

Reference intervals for white blood cell count during pregnancy

Methods	RI for 0–2 weeks†	RI for 3–5 weeks	RI for >=6 weeks
Non-pregnant 95% reference Intervals (×10^9/L)	4.0–10.0	4.0–10.0	4.0–10.0
Pregnant 95% reference intervals based on threshold regression (suggested) (×10^9/L)	4.0–10.0	4.7–11.9	5.7–14.4
Parametric pregnant 95% reference intervals (×10^9/L)	3.8–9.8	4.6–13.2	5.9–14.5
Non-parametric pregnant 95% reference intervals (×10^9/L)	3.9–9.1	4.6–12.9	5.9–14.4

†RI, reference interval