Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,888 questions · 2,009 findings · 352 reviews

No studies found 224 · 11.1%GRADE not reported 265 · 13.2%Very low 551 · 27.4%Low 540 · 26.9%Moderate 311 · 15.5%High 118 · 5.9%

Routine/revealed vs selective/concealed ultrasound

Detection of fetal abnormality before 24 weeks' gestation · Fetal ultrasound assessment before 24 weeks' gestation

Routine/revealed probably leads to higher detection of fetal abnormality before 24 weeks' gestation compared with selective/concealed ultrasound (moderate certainty).

1 finding from 1 review

Routine/revealed vs selective/concealed ultrasound

Detection of multiple pregnancy by 24 to 26 weeks' gestation (number NOT detected) · Fetal ultrasound assessment before 24 weeks' gestation

Routine/revealed probably leads to lower detection of multiple pregnancy by 24 to 26 weeks' gestation (number… compared with selective/concealed ultrasound (moderate certainty).

1 finding from 1 review