No abstract available
Publication types
-
Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
-
Amniocentesis
-
Female
-
Gestational Age
-
Humans
-
Maternal-Fetal Exchange
-
Neural Tube Defects / blood
-
Neural Tube Defects / diagnosis*
-
Pregnancy
-
Prenatal Diagnosis / methods*
-
alpha-Fetoproteins / metabolism*