<1 month:

None established. Fetal AFP concentrations may reach or exceed 100,000 ng/mL after birth depending on gestational age and birth weight.

1-3 months:

50.0-1000.0 ng/mL

3-6 months:

10.0-500.0 ng/mL

6 mo-1 year:

3.0-100.0 ng/mL

≥ 1 year:

0.0-8.3 ng/mL