Clinical Evaluation of Labor and Intrapartum Sonography.- General Setup of Intrapartum Sonography and Its Utilization in Labor.- The Use of Ultrasound in the Latent and Active Phase in the First Stage of Labor.- Intrapartum Sonography and Labor Progression.- Occiput Posterior Position and Intrapartum Sonography.- Asinclytism Clinical and Intrapartum Diagnosis in Labor.- The Angle of Progression: An Objective Assessment of Fetal Head Descent in the Birth Canal.- Head Rotation in Labour and Intrapartum Sonography Diagnosis with 2D and 3D.- The Progress of Labour Using Intrapartum Translabial Ultrasound, Assessing Head Station, Direction, and Angle of Descent.- The Use of Intrapartum Sonography Cervical Lenght.- Intrapartum Sonography and Obstetric Risk Management.- New Technologies for Labour Management.