Transvaginal ultrasonographic detection of congenital anomalies in the first trimester.

Cullen, M T; Green, J; Whetham, J; Salafia, C; Gabrielli, S; Hobbins, J C · Am J Obstet Gynecol · 1990

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Abstract

Transvaginal ultrasonography enables detailed visualization of the first-trimester pregnancy. Thirty-three structural anomalies have been diagnosed in the first trimester of pregnancy during a 2-year study period. An understanding of normal embryonic development is essential before attempting diagnosis in this gestational period.

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