Transvaginal sonographic fetal axis determination in early second trimester

Archives of Gynecology and Obstetrics
Yoav PeledJosef Pardo

Abstract

Correct prenatal determination of the fetal right/left axis is essential for the diagnosis of fetal malformations, in particular congenital heart anomalies. A reliable method of transabdominal echocardiographic assessment of the fetal situs in the late second trimester was established. We aimed to determine the validity of the transvaginal approach to assess fetal axis. The study group consisted of 108 consecutive women in the second trimester of a singleton pregnancy, undergoing elective transvaginal anatomy scans. All had undergone previous transabdominal echocardiography to establish fetal axis. The same technique was used to assess the fetal axis during the transvaginal study, and the findings were compared. There was total agreement in fetal axis determination between transabdominal and transvaginal scans in all cases. The accuracy of the transvaginal study was not affected by maternal obesity, fetal position or the presence of cardiac malformation (in one case). Transvaginal ultrasonography is the reliable and accurate means of determining the fetal axis.

References

Jun 28, 1986·British Medical Journal·L D AllanM J Tynan
Jan 1, 1994·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·T M CordesD J Hagler
Jun 8, 2002·Obstetrics and Gynecology·Moshe BronshteinEtan Z Zimmer
Aug 11, 2004·International Journal of Obesity and Related Metabolic Disorders : Journal of the International Association for the Study of Obesity·I HendlerY Sorokin
Aug 27, 2005·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Israel HendlerYoram Sorokin

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