Sjenny Olga Tuju; Atik Purandari; Sandra G.J.Tombokan; Nanik Wahyuni; Fredrika Losu. Preparation for Childbirth Through Massage Effluerage Training, Hypnobirthing Yoga Exercises in Silian 1 Village, Silian District, Southeast Minahasa Regency. jnb 2023, 1, 27-35.