Hormone Inhibin A Test Test Overview The inhibin A test is done to measure the amount of this hormone Down syndrome placenta
The level of inhibin A in the blood is used in a maternal serum quadruple screening test. Generally done between 15 and 22 weeks, this test checks the levels of four substances in a pregnant woman's blood. The quad screen checks alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), a type of estrogen (unconjugated estriol, or uE3), and the hormone inhibin A. The levels of these substances—along with a woman's age and other factors—help the doctor estimate the chance that the baby may have certain problems or birth defects.
Why It Is Done
A test for inhibin A is done in addition to other tests to see if there is a chance of chromosome
How To Prepare
In general, there's nothing you have to do before this test, unless your doctor tells you to.
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How It Is Done
A health professional uses a needle to take a blood sample, usually from the arm.
Watch How It Feels
When a blood sample is taken, you may feel nothing at all from the needle. Or you might feel a quick sting or pinch.
Risks
There is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the site.
Results
A normal result means that the level of the hormone inhibin A is low, or negative. An abnormal result means the level of the hormone inhibin A is high, or positive.footnote 1
All abnormal results will need to be discussed with your doctor.
Related Information
References
Citations Mosby's Manual of Diagnostic and Laboratory Tests , 4th ed. St. Louis: Mosby Elsevier.Credits
Current as of: April 30, 2024
Current as of: April 30, 2024
Pagana KD, Pagana TJ (2010). Mosby's Manual of Diagnostic and Laboratory Tests , 4th ed. St. Louis: Mosby Elsevier.
