In Down's syndrome, the serum markers..........
Triple test (combined test): MSAFP, Unconjugated estriol (E3) and hCG. Quadruple test: MSAFP, UE3, hCG, Inhibit-A Integrated test: NT, PAPP-A + hCG reference: D C Dutta's Textbook of obstetrics 7th edition page no 494