embryo

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

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

Scientists study the development of scales in skate embryos. 

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

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

To track distinct populations of developing cardiovascular cells, scientists used pulses of electricity to introduce fluorescently labeled DNA into chick embryos.

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

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

This fluttering clump of colorful cells is a zebrafish embryo, visualized by many stacked images.

Transfer RNA fragments prevent jumping genes from hopping around in the mouse embryo, when histone methylation can’t do the job.

Spotted salamander (Ambystoma maculatum) embryos are tinted green by the oxygen-producing algae (Oophila amblystomatis) that grow inside.

The infamous "Baby Louie" embryo is a giant oviraptorosaur fossil from China that resembled a gargantuan bird.

The 19th century biologist’s drawings, tainted by scandal, helped bolster, then later dismiss, his biogenetic law.

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

Scientists issue a call to reconsider the rules governing the creation of tissues, organs, and other structures made possible by recent advances in synthetic biology. 

Researchers report growing a mouse embryo using two types of early stem cells.

Andrzej Tarkowski’s research laid the groundwork for future advances in cloning, stem cell research, and in vitro fertilization.

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

For the second time, researchers use CRISPR to modify the genomes of nonviable embryos.