The investigator will evaluate the detection rate for Obstetric Anal Sphincter Injuries (OASI) in primiparas having given vaginal childbirth, comparing the sensitivity of methods available in a labour ward setting for rapid detection: standard digital rectal examination (DRE) and Machine Learning-assisted electrical impedance spectroscopy (applied with the ONIRY system). Endoanal Ultrasound (EAUS) is used as the reference standard for diagnosis' confirmation and performed within 12 weeks post-delivery.
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The investigator will evaluate the detection rate for OASI in primiparous women who have completed vaginal delivery comparing standard digital rectal digital rectal examination and machine learning-assisted electrical impedance spectroscopy.
Timeframe: From enrollment to the follow-up visit that will be performed within 12 weeks postpartum