The normal range for growth hormone level is typically:
- 1 through 9 nanograms per milliliter (ng/mL) for males
- 1 through 16 ng/mL for females
GH is released in pulses. This is why random GH measurements are rarely useful. A higher level may be normal if the blood was drawn during a pulse. A lower level may be normal if the blood was drawn around the end of a pulse. GH is most useful when measured as part of a stimulation or suppression test.