Neural tube abnormalities.
Nicolaides
K
K
Campbell
J
J
D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D016136:Spina Bifida Occulta / Q000175:diagnosis*; D014463:Ultrasonography