Embryo Experiments Reveal Earliest Human Development, But Stir Ethical Debate
Researchers who study developing human embryos have long limited their experimentation to lab embryos that are no more than 14 days into development. Some scientists are now pushing that boundary.
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Children's Health
March 2, 2017 at 05:08PM
Thứ Năm, 2 tháng 3, 2017
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