Role of intrapartum transperineal ultrasound in predicting mode of delivery in primigravida women

Objectives To evaluate if the different intrapartum transperineal ultrasound (ITU) parameters [angel of progression (AOP), head direction (HD), and head progression distance (HPD)] are significant indicators to predict mode of delivery and discuss the role of ITU parameters in the prediction of mode of delivery in primigravida women. Background Spontaneous vaginal delivery without obstetric intervention is the suitable outcome for most pregnancies. However, some women fail to progress in the second stage of labor and so require operative delivery. Patients and methods In this cross-sectional study, a transperineal ultrasound examination was performed in 70 nulliparous women aged from 18 to 40 years old with single live fetus in cephalic presentation, at term (≥37 weeks), in the active phase of labor. Data were collected and tabulated. Results There were good correlations between ITU parameters and delivery mode using a cutoff of more than or equal to 120° for the AOP and a cutoff of less than or equal to 45 mm for the HPD. The HD was divided into three categories of more than 30°, 0–30°, and less than 0°. Conclusion The sonographic parameters AOP, HPD, and HD can be used to predict the mode of delivery in primigravida women.