Triple test for diagnosis of Down's syndrome includes all of the following except –
Triple test is a combined biochemical test which includes → MSAFP, HCG, & Oestriol

In an affected pregnancy  
level of MSAFP is decreased
level of oestriol is decreased
the level of hCG is High (increased)
β–HCG
α–Fetoprotein
Serum HPL level
Serum oestriol level