A single amino acid substitution in a protein causes increased neuron production in the frontal lobes of humans compared to Neanderthals—a tiny difference that could have given our species a cognitive edge, researchers say.

Using stem cells and a bioreactor, researchers generated living embryos that survived for more than a week and began to develop internal organs.

As cricket blastoderms form, cell nuclei are pulled into an egg’s remaining empty space to form the new cell layers that will shape the developing animal.

Mintz’s experiments over her six-decade career were foundational to cancer and genetics research.

Recent findings buck the traditional idea that embryos are passive agents and instead suggest that by tuning into vibrations, organisms can better prepare to enter the outside world.

A transposable element that jumped into the TBXT gene, which is linked to tail morphology, appears to be to blame for our missing appendage.

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

The embryos completed one-third of their total gestation outside of a uterus.

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.

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.

To study the fate of stem cells in developing chick embryos, researchers trace their steps over time.

The bipaternal pups died soon after birth, but mice with two mothers grew into fertile adults.

The winner of the 2018 Nikon Small World in Motion video competition shows the development of sensory neurons in a zebrafish embryo.

Methylation patterns at so-called metastable epialleles in the genome stamp a memory into each of our cells.

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 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.

Disrupting the light/dark cycles of pregnant mice, researchers observe detrimental effects in the mouths of the animals’ pups.

From whole cells to genes, closer examination continues to surprise.