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The switch from maternal factors involves dynamic reprogramming of the zygotic genome.

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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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Researchers use base-editing to swap out an erroneous nucleotide responsible for a potentially life-threatening blood disorder.

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image: Scientists Doubt Results of CRISPR’d Embryos

Scientists Doubt Results of CRISPR’d Embryos

By Aggie Mika | August 31, 2017

Six scientists question the authors’ conclusions about the DNA repair process that led to the human embryos’ correction of a defective gene.

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image: Details Published on CRISPR-treated Embryos

Details Published on CRISPR-treated Embryos

By Kerry Grens | August 2, 2017

Scientists correct a mutation in fertilized eggs that causes a severe cardiac disease.

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image: Scientists Edit Viable Human Embryos in U.S.

Scientists Edit Viable Human Embryos in U.S.

By Kerry Grens | July 27, 2017

The embryos, whose genes were altered by CRISPR, were not intended for implantation. 

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image: Image of the Day: See-Through Embryos

Image of the Day: See-Through Embryos

By The Scientist Staff | March 27, 2017

Scientists have created a high-resolution, 3-D atlas of human embryonic development during the first trimester of gestation.

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image: TS Picks: September 26, 2016

TS Picks: September 26, 2016

By Tracy Vence | September 27, 2016

World leaders agree to fight superbugs; researchers edit human embryos; peer reviewers’ motivations

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image: Embryo Watch

Embryo Watch

By Jef Akst | May 5, 2016

A new culture system allows researchers to track the development of human embryos in vitro for nearly two weeks.

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image: Embryo Editing Gets Green Light in U.K.

Embryo Editing Gets Green Light in U.K.

By Bob Grant | February 2, 2016

Researchers at the Francis Crick Institute in London will use CRISPR/Cas9 to modify genes in early human embryos.

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