Follow-up of elevated maternal serum alpha-fetoprotein levels: ultrasonography only or amniocentesis?
Whitehead
N
N
MacMahon
W
W
Fernhoff
P
P
Priest
J
J
D000649:Amniocentesis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis*
D000509:alpha-Fetoproteins