Ultrasound squares off against amniocentesis.
Frazer
H A
HA
D000649:Amniocentesis / Q000009:adverse effects; D005260:Female; D006801:Humans; D007258:Informed Consent; D009436:Neural Tube Defects / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011247:Pregnancy; D012307:Risk Factors; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000379:methods / Q000592:standards