Kownaklai, Jaruwan, Titaree Phanwichatkul, Atchara Chaichan, and Amanda Lee. 2024. “Effectiveness of Spontaneous Pushing Versus Valsalva Pushing in the Second Stage of Labor on Maternal and Neonatal Outcomes: A Systematic Review and Meta-Analysis”. Pacific Rim International Journal of Nursing Research 28 (2):407-20. https://doi.org/10.60099/prijnr.2024.264145.