Human-Monkey Chimeras Shed Light on Development
Human-Monkey Chimeras Shed Light on Development
Human stem cells injected into early monkey embryos proliferate and contribute to multiple cell lineages over 20 days of embryonic development.
Human-Monkey Chimeras Shed Light on Development
Human-Monkey Chimeras Shed Light on Development

Human stem cells injected into early monkey embryos proliferate and contribute to multiple cell lineages over 20 days of embryonic development.

Human stem cells injected into early monkey embryos proliferate and contribute to multiple cell lineages over 20 days of embryonic development.

embryonic development
Lab-Grown Mouse Embryos Form Limbs and Organs
Lab-Grown Mouse Embryos Form Limbs and Organs
Lisa Winter | Mar 19, 2021
The embryos completed one-third of their total gestation outside of a uterus.
Identical Twins Accumulate Genetic Differences in the Womb
Identical Twins Accumulate Genetic Differences in the Womb
Catherine Offord | Jan 7, 2021
DNA replication errors during cell division cause monozygotic twins to diverge from each other even during the earliest stages of development, a new study finds.
Early Embryo Models Generated from Mouse Stem Cells
Early Embryo Models Generated from Mouse Stem Cells
Abby Olena | Oct 17, 2019
Extended pluripotent stem cells from mice can self-organize to form blastocyst-like structures called blastoids that enable a closer look at early mammalian development.
Image of the Day: Cellular Tracks
Image of the Day: Cellular Tracks
Carolyn Wilke | Jan 21, 2019
To study the fate of stem cells in developing chick embryos, researchers trace their steps over time.
First Mouse Embryos Made from Two Fathers
First Mouse Embryos Made from Two Fathers
Abby Olena | Oct 11, 2018
The bipaternal pups died soon after birth, but mice with two mothers grew into fertile adults.
Image of the Day: The Birth of a Nervous System
Image of the Day: The Birth of a Nervous System
Jef Akst | Oct 2, 2018
The winner of the 2018 Nikon Small World in Motion video competition shows the development of sensory neurons in a zebrafish embryo.
In Their Earliest Days, Embryos Record Their Environments
In Their Earliest Days, Embryos Record Their Environments
Kerry Grens | Oct 1, 2018
Methylation patterns at so-called metastable epialleles in the genome stamp a memory into each of our cells.
Animals’ Embryonic Organizer Now Discovered in Human Cells
Animals’ Embryonic Organizer Now Discovered in Human Cells
Jim Daley | May 23, 2018
The finding confirms that a cluster of cells that directs the fate of other cells in the developing embryo is evolutionarily conserved across the animal kingdom.
New Techniques Detail Embryos’ First Hours and Days
New Techniques Detail Embryos’ First Hours and Days
Jef Akst | Dec 1, 2017
New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.