"Insights from embryo models could help to explain why about one-third of natural embryos don't make it past their first weeks. This could help to address infertility, improve the success rate of in vitro fertilization and even prevent diseases that emerge early in development."
"As these models become increasingly complex, and reach symbolic milestones, such as the first heartbeat, they raise tricky ethical questions. Ethicists, regulators and legal specialists are scrambling to address the implications of these scientific advancements."
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