Hemoglobin

Birth: 13.5 to 24.0 g/dl (mean 16.5 g/dl)
Age <1 month: 10.0 to 20.0 g/dl (mean 13.9 g/dl)
Age 1-2 months: 10.0 to 18.0 g/dl (mean 11.2 g/dl)
Age 2-6 months: 9.5 to 14.0 g/dl (mean 12.6 g/dl)
Age 0.5 to 2 years: 10.5 to 13.5 g/dl (mean 12.0 g/dl)
Age 2 to 6 years: 11.5 to 13.5 g/dl (mean 12.5 g/dl)
Age 6-12 years: 11.5 to 15.5 g/dl (mean 13.5)
Male
1. Age 12-18 years: 13.0 to 16.0 g/dl (mean 14.5 g/dl)
2. Age >18 years: 13.6 to 17.7 g/dl (mean 15.5 g/dl)
Female
1. Age 12-18 years: 12.0 to 16.0 g/dl (mean 14.0 g/dl)
2. Age >18 years: 12.1 to 15.1 g/dl (mean 14.0 g/dl)

Men and adolescent males
1. Age 12-18 years: <13 g/dl (mean 14.5 g/dl)
2. Age >18 years: <13 g/dl (WHO) or <13.5 g/dl (CDC)
Women and adolescent girls (Non-pregnant, non-lactating)
1. Age 12-18 years: <12 g/dl (mean 14 g/dl)
2. Age >18 years: <12 g/dl (WHO and CDC)
Women in Pregnancy (CDC Guidelines <5th percentile)
1. First Trimester: <11.0 g/dl
2. Second Trimester: <10.5 g/dl
3. Third Trimester: <11.0 g/dl
Children (CDC Guidelines <5th percentile)
1. Age 1-2 years: <10.5 g/dl
2. Age 2-6 years: <11.5 g/dl (mean 12.5 g/dl)
3. Age 6-12 years: <11.5 g/dl (mean 13.5 g/dl)
Infants (2 S.D. below mean)
1. Term (cord blood): <13.5 g/dl (mean 16.5 g/dl)
2. Newborn (1-3 days): <14.5 g/dl (mean 18.5 g/dl)
3. Age 2 weeks: <13.4 g/dl (mean 16.6 g/dl)
4. Age 1 month: <10.7 g/dl (mean 13.9 g/dl)
5. Age 2 months: <9.4 g/dl (mean 11.2 g/dl)
6. Age 6 months: <10.5 g/dl (mean 12 g/dl)