Inhibin A Test is a basic blood test that measure the level Inhibin A in the blood. It is used in

pregnant women who are suspected of carrying a foetus with down syndrome. The Inhibin A

test is also used for the diagnosis of Granulosa cell tumours and Mucinous Epithelial Ovarian

Tumour.The normal range of inhibin A at 15–19 weeks was 41.4–690 pg/ml and at 21–25 weeks

was 47.6–1719 pg/ml. The normal ranges of activin A at 15–19 weeks and 21–25 weeks were

0.64–15.71 and 0.86–28.74 ng/ml.