Hormone Inhibin A The inhibin A test is done to measure the
amount of this Reference hormone Opens New Window in a pregnant
woman's blood to see if the baby may have Reference Down
syndrome Opens New Window. Inhibin A is made by the Reference
placenta Opens New Window during pregnancy. The level of inhibin
A in the blood is used in a Reference maternal serum quadruple
screening test. Generally done between 15 and 20 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. - Opens New Window Pregnancy: Should
I Have the Maternal Serum Triple or Quadruple Test? Opens New
Window |By:||Reference Healthwise Staff||Last Revised: Reference
April 4, 2012| |Medical Rev