Though no prospective, randomized trial has compared transvaginal with translabial
sonography in the imaging of placenta previa, TVS is safe and well tolerated, with no increase in bleeding.
Safer and more accurate than manual evaluation or translabial
ultrasound, transvaginal ultrasound is "uniquely suited" to determine the management of placenta previa, placenta accreta, and vasa previa.
SAN FRANCISCO -- Consider asking pregnant women to make an autologous blood donation if translabial or endovaginal ultrasounds show the placenta within 2 cm of the internal os, Dr.
In the study, women with placentas located 3 cm or closer to the internal os on third-trimester transabdominal ultrasound underwent further assessment by translabial or endovaginal ultrasound, which was repeated in any subsequent ultrasound evaluations.