Objective: To determine the usefulness of intrapartum transperineal ultrasound in the progression of labor in patients admitted to the Concepción Palacios Maternity Parting Room Service, in the period May-August 2019. Methods: Prospective, descriptive and longitudinal study involving 98 patients. Transperineal ultrasound was performed every two hours during labor, evaluating cervical characteristics and changes in fetal head position and decline variety, linking them to clinical findings. Results: 219 ultrasounds were performed. At the begin, the ultrasound mean of the dilation was 5.94 x 1.70 cm and by clinic was 5.96 x 1.80 cm (p-0.717). At two hours, it was 8.14 x 1.92 cm and 8.15 x 2.07 cm, respectively (p-0.849). At the third control, it was 8.35 x 1.70 cm per ultrasound and by clinic it was 8.43 x 1.97 (p.0.604). With regard to erasure, among the 4 patients with grade 3 (the least erasure), 1 (25%) neck erased 40% - 50% and 3 (75%), 60% - 70%; 116 (100%) patients ultrasound as grade 0 (the maximum erasure), had a neck erased by more than 80%. There was an association between Hodge’s plane with the head-to-perineum distance (p-0.001) and the mid-line angle (p-0.001). There was no association with head-symphysis distance. Satisfaction was 100%. Conclusion: Intrapartum transperineal ultrasound is useful in evaluating the progression of labor. Keywords: Transperineal, Position variety, Fetal head descent.