Dahlan, F.M., Suciawati, A. and Sri, F. 2023. Effect of Birth Balls on Reducing Labor Pain During First Stage of Active Phase in Primigravida Maternity. International Journal of Midwifery and Health Sciences. 1, 2 (Jul. 2023), 77–85. DOI:https://doi.org/10.61777/ijmhs.v1i2.38.