Handayani, Nanik, Yasi Anggasari, Rata Ariesta D.A, and Ika Mardiyanti. “The Effectiveness of Birthing Ball Gymnastics on Primigravida Maternity Gestational Age”. South Eastern European Journal of Public Health (September 2, 2024): 454–459. Accessed March 8, 2026. https://seejph.com/index.php/seejph/article/view/874.