Ratna Sari, E.Y., Mareti, Mustika, L., Haryati, Furwanty, D. and Sari, S.Si.T., M.Keb, K. 2026. Literature Review: Relationship of Uterine Contractions with the Event of the First Stage of the Prolonged Active Phase. Proceedings of Conference on Health Universitas Ngudi Waluyo. 3, 1 (Jun. 2026), 52–58.