Darmayanti, P. A. R., Ariani, N. K. S. and Santhi, W. T. (2022) “The effect of endorphin massage on reducing the intensity of childbirth pain Kala I in maternity mothers”, International journal of health sciences, 6(S9), pp. 2038–2045. doi: 10.53730/ijhs.v6nS9.12878.