acetylcholinesterase ( ache ) , butyrylcholinesterase ( bche ) and alpha-fetoprotein ( afp ) were measured in 293 amniotic fluids from the second and third trimesters of pregnancy in a prospective study of their diagnostic value in the detection of neural-tube defects ( ntd ) .
C0001044
acetylcholinesterase
C0008429
butyrylcholinesterase