Abstract
Authors' reply to Letter to the Editor: Boiani, M. and Denker, H-W. (2026). Stem cell-based embryo models: scientific promise clashes with ethical reality, Human Reproduction, 2026, deag112, https://doi.org/10.1093/humrep/deag112 regarding their article Arias, A. M., Rivron, N., Tajbakhsh, S., Johnston, J., Alev, C., Bally-Cuif, L., Böke, E., Cavazza, T., Cave, E., Cyranoski, D., & et al. (2026). Human stem cell-based embryo models: innovation, ethics, and policy. Human Reproduction, 41(6): 830-846. https://doi.org/10.1093/humrep/deag035