<prompt> Triple test includes all EXCEPT -Inhibin AAFPHCGUE3  <response>: A Inhibin A 106 - Dutta 7thInhibin A is a dimeric glycoprotein. It is produced by the corpus luteum and the placenta. Serum levels of inhibin A is raisedin women carrying a fetus with Downs syndrome.Acetvle choline esterase AChE Amniotic fluid AChE level is elevated in most cases of open neural tube defects. It has got better diagnostic value than AFP.Pregnancy associated plasma protein - A PAPPA is secreted the syncytiotrophoblast. It act as a immune suppressant in pregnancy.A QUADRUPLE TESTMSAFPSecond trimester screetingUE3 Unconjugated estriol15 - 18 weeks can defectTotal hCGtrisomy 21 in 80 of affected pregnancies respectivelyInhibin AB TRIPLE TESTMSAFPSecond trimester screetingUE3 Total hCGFirst trimester screening hCG, MSAFP, PAPP can detect trisomy 21 in 85 with a false positive rate of 5. 