<prompt> In Downs syndrome, 2nd trimester quadruple test includes all EXCEPT:Alpha fetoproteinHCGInhibin APAPP  <response>: Ans. d PAPP The triple test measures the following three levels in the maternal serum: sensitivity 71 Alpha-fetoprotein AFP Human chorionic gonadotropin hCG Unconjugated estriol UE3 Quadruple test include: triple test Inhibin A: increases sensitivity upto 80The levels may indicate increased risk for certain conditions: hCGAssociated conditionsLowLowHighDowns syndromeLowLowLowTrisomy 18 Edwards syndromeHigh--NTD, omphalocoele, gastrochisis 