I live in Vietnam and my wife is pregnant for 3 months, the doctor ask us if we want to do a blood test for the down syndrome. There is 2 different tests:
1st trimester : PAPP-A, free β –hCG (double screening marker)
2nd trimester : Triple test (AFP + β- hCG+ Estriol), Quad test (+ Inhibin – A)
Do you if this test is useful and reliable ? Do you recommend to do it ?
Thanks a lot for your help