Which of the following markers is not used in quadruple test for antenatal detection of Down syndrome?
AFP
ss-hCG
Estradiol
Inhibin
Quadruple test is the second trimester measurement of maternal serum 1 Alpha fetoprotein ( MSAFP) : decreased2 unconjugated estriol: decreased3 HCG: increased4 Inhibin A : increased - It is done between 15 - 20 weeks