The Effect of Endorphin Massage on Back Pain in Pregnant Women. JURNAL KEBIDANAN KESTRA (JKK), [S. l.], v. 8, n. 1, p. 54–60, 2025. DOI: 10.35451/1nccba60. Disponível em: https://ejournal.medistra.ac.id/index.php/JKK/article/view/3195. Acesso em: 3 nov. 2025.