Reproducibility and acceptability of ultrasound measurements of head-perineum distance.
Sigurlaug BenediktsdottirKjell Å SalvesenHulda HjartardottirTorbjørn Moe EggebøPublished in: Acta obstetricia et gynecologica Scandinavica (2017)
We found excellent intra-observer repeatability, good correlation but significant difference between devices. Women reported less discomfort with ultrasound than with clinical examinations.