Random Growth Hormone (GH) measurements are of limited value.
Dynamic tests are required for proper diagnosis. For investigation
of acromegaly a
IGF1 level or growth hormone suppression test is of
Request on ICE
Requested by Consultant Endocrinologists or agreed with
Is used as part of growth hormone suppression test or GH
stimulation tests (clonidine or insulin)
It is advisable to avoid stress.
Ideally fasting samples should be collected
Aliquot and freeze at minus 20°C.
Causes for Rejection
Not meeting specific criteria for analysis.; unlabelled or
incorrectly labelled sample.
No reference range, as GH is secreted in a pulsatile
Male reference range: <3 µg/L
Female reference range: <8 µg/L
Results above these ranges require further investigation, unless
the patient is known to have acromegaly.
NOTE: In line with international
recommendations, growth hormone is now reported in mass units
(µg/L). To convert from µg/L to mU/L multiply the result by