Most specific marker for neural tube defects is
Both alpha-fetoprotein and acetylcholinesterase in amniotic fluid are markers for neural tube defects. But acetylcholinesterase is the most specific marker. Ref : Dutta book of obstetrics 8th Ed
Alpha-fetoprotein
Unconjugated estriol
Acetylcholinesterase
Pseudocholinesterase
All India exam