Fahlevie, Rizah, Meriadi, Helni Anggraini, and Satra Yunola. “The Effectiveness Of Birth Ball On The Long Time Of Active Phase I In Primigravida In Pmb Az-Zahwa Muara Enim In 2021”. Science Midwifery 10, no. 2 (April 11, 2022): 825-828. Accessed October 9, 2024. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/365.