THE EFFECT OF HYPNOBIRTHING ON THE LENGTH OF THE FIRST STAGE OF LABORAT PMB PEKANBARU CITY. JURNAL IBU DAN ANAK [Internet]. 2022 Nov. 30 [cited 2026 Mar. 31];10(2):119-23. Available from: https://jurnal.pkr.ac.id/index.php/JIA/article/view/629