Table 1: plasma hemoglobin concentration of non-pregnant and pregnant women

State

Mean Hb Concentration (mg/dl)

Acceptable Lower Limit, mg/dl (Mean -2SD)

Non-pregnant (n=53)

11.9 ± 1.15

9.6

Pregnant

1st trimester (n=39)

12.1 ± 1.22

2nd trimester  (n=78)

12.0 ± 1.44

3rd trimester (n=45)

11.9 ± 1.85

Pregnant-All (n=162)

12.0 ± 1.43

9.0

1st trimester = ≤ 12 weeks pregnancy, 2nd trimester = 13 – 27 weeks pregnancy, 3rd trimester = ≥ 28 weeks pregnancy.  F(0.147), df 3, p = 0.931