Triple test includes all the following EXCEPT?

Triple test includes: AFP HCG Estradiol Quadruple test: also include Inhibin All women are offered screening for Down syndrome in their 2nd trimester by means of 4 maternal serum tests (free b-human chorionic gonadotropin , unconjugated estriol, inhibin, and a-fetoprotein). This is known as the quad screen; it can detect up to 80% of Down syndrome pregnancies compared to 70% in the triple screen.