Ultrasound imaging during pregnancy.
D002983:Clinical Competence; D003955:Diagnostic Tests, Routine; D004869:Equipment Safety; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D007258:Informed Consent; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D012306:Risk; D014463:Ultrasonography / Q000009:adverse effects