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New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.

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image: CRISPR Used in Human Embryos to Probe Gene Function

CRISPR Used in Human Embryos to Probe Gene Function

By Ashley P. Taylor | September 20, 2017

OCT4 is necessary for blastocyst formation in the human embryo, researchers report.

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image: Coming to Terms

Coming to Terms

By Anna Ajduk and Magdalena Zernicka-Goetz | November 1, 2012

New noninvasive methods of selecting the most viable embryo could revolutionize in vitro fertilization.

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image: Mammal Embryos May Pause

Mammal Embryos May Pause

By Sabrina Richards | March 19, 2012

Mammalian embryos may be able to undergo a developmental pause before implanting in the womb.

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