Transvaginal ultrasonography for all placentas that appear to be low‐lying or over the internal cervical os

@article{Smith1997TransvaginalUF,
  title={Transvaginal ultrasonography for all placentas that appear to be low‐lying or over the internal cervical os},
  author={R. Smith and M. Lauria and C. Comstock and M. Treadwell and J. Kirk and W. Lee and S. Bottoms},
  journal={Ultrasound in Obstetrics and Gynecology},
  year={1997},
  volume={9}
}
The purpose of this study was to determine in what percentage of cases the assessment of placental localization using transabdominal sonography (TAS) was changed after transvaginal sonography (TVS) was applied. TVS was prospectively performed on all pregnant women of at least 1.5 weeks' gestation, when the placental edge using TAS appeared to be over or within 2 cm (low‐lying) of the internal cervical OS. The time required for the TVS scan and the distance of the placental edge from the… Expand
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