Cite

    Angeli, L., Conversano, F., Dall'Asta, A., Volpe, N., Simone, M., Di Pasquo, E., Pignatelli, D., Schera, G. B. L., Di Paola, M., Ricciardi, P., Ferretti, A., Frusca, T., Casciaro, S., & Ghi, T. (2020). new technique for automatic sonographic measurement of change in head–perineum distance and angle of progression during active phase of second stage of labor. Ultrasound in obstetrics & gynecology, 56, 597–602. http://access.bl.uk/ark:/81055/vdc_100112032936.0x000049