This test is performed to check the amount of cortisol and a special hormone called 17 hydroxy progesterone in your body and to check how well your body can produce cortisol.

Cortisol is one of the essential steroid hormones to keep you healthy. 17 hydroxy progesterone is an intermediate product in the production of cortisol which is present at very low level in a female, but can be raised in the genetic disorder called congenital adrenal hyperplasia.

It will be better to have the test in the morning. You will be requested to remain in bed rest during the test. You should not have the test if you have significant asthma.

You will be asked to lie flat for the duration of the test. Your named nurse will introduce herself and explain what to expect.

A small needle/canula will be inserted into a vein in the back of your hand or arm. This is called a venflon and allow your named nurse to obtain blood samples without causing too much discomfort.

We will take a blood sample to check the baseline level of hormones. We will then give you an injection to stimulate your own body production of cortisol. A blood sample will be taken at 30 minutes and 60 minutes after the stimulation to measure the cortisol and 17 hydroxy progesterone level.

If there is a partial blockage in production of cortisol, 17 hydroxy progesterone may be high at the outset and increase to even higher levels during the test.

On completion your venflon will be removed and you will be offered refreshments prior to going home.

Your doctor will be informed of the results. Measurement of 17 hydroxy progesterone canl take 3 to 4 weeks before we can get the result.

Please note that Clinical Investigation Unit has no smoking policy.

If you have any queries or worries, please do not hesitate to contact the nursing staff for further information on 01382 632494.

We hope to make your stay as pleasant as possible.