First trimester ultrasonographic diagnosis of fetal structural abnormalities in a low risk population.

Abstract

OBJECTIVES Ultrasonographic screening between 12(+0) and 13(+6) weeks for fetal structural abnormalities using transabdominal sonography and, where necessary, transvaginal sonography in a low risk population. DESIGN A prospective observational study. SETTING London teaching hospital. METHODS Pregnant women with a total of 1632 low risk viable fetuses… (More)

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