The Angle of Progression at Station 0 and in Magnetic Resonance and Transperineal Ultrasound Assessment

  • Iliescu D
  • Tudorache S
  • Dragusin R
  • et al.
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Abstract

The transperineal ultrasound (TPU) value of the angle of progression (AOP) during fetal head engagement, at station 0, is a critical cut-off for current obstetrical practice, especially when intrapartum instrumental interventions are required. Still, controversial measurements were reported in previous high resolution imagistic studies. Our TPU and direct “gold-standard” magnetic resonance (MRI) measurements confirm that station 0 corresponds to a 120° AOP, concordantly. Based on these findings, the fact that an AOP of 120° or greater was previously strongly associated with vaginal delivery may be due to the achievement of head engagement in labor.

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Iliescu, D., Tudorache, S., Dragusin, R., Carbunaru, O., Patru, C., Florea, M., & Gheonea, I. A. (2015). The Angle of Progression at Station 0 and in Magnetic Resonance and Transperineal Ultrasound Assessment. Case Reports in Obstetrics and Gynecology, 2015, 1–3. https://doi.org/10.1155/2015/748327

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