The Effect of Pregnancy in the Hemoglobin Concentration of Pregnant Women: A Longitudinal Study

Table 3

The quartiles of hemoglobin concentration during each phase of pregnancy ().

Visit	Mean hemoglobin concentration (g/dl)			Proportion of hypochromic, microcytic anemia
	25 percentile	50 percentile	75 percentile
Before pregnancy	10	11	12	63.9%
During the first trimester	10	11	11	71.5%
During the second trimester	10	10	10	85.5%
During the third trimester	10	10	10	94.6%
During the onset of labor	9	10	10	91.8%
After third stage of labor	10	10	10	85.5%
After 6 weeks	9	10	10	68.2%