An exploratory proposal for a revision to the 14-day rule in the regulatory context of China.

Tan, Tao; Lu, Xiao; Li, Tianqing; Wei, Jingkuan; Wang, Hongmei; Ji, Weizhi · Cell Stem Cell · 2025

expert_opinion · Level V

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Abstract

Recent advances in human embryo culture and revised guidelines from the International Society for Stem Cell Research (ISSCR) give grounds for extending the 14-day limit. To prepare for any possible future change in China's regulation, we propose a path toward cautious extension with strict oversight, balancing scientific progress with ethical responsibility.

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