A breakthrough animal embryo transfer proves a high-tech lifeline for the northern white rhino and sparks important ethical debates.

Embryo development starts when a single egg cell is fertilized and starts dividing continuously. Initially a chaotic cluster, it gradually evolves into a highly organized structure. Scientists have ...

A single-celled creature originally found in shallow sea sediments around Hawaii develops into multicellular structures with remarkable similarities to animal embryos. The finding could help ...

Images of the multicellular development of the ichthyosporean Chromosphaera perkinsii, a close cousin of animals. In red, the membranes and in blue the nuclei with their DNA. The image was obtained ...

Speaking at a recent meeting of the British Pharmacological Society in Brighton, UK, Christine Mummery described how using embryonic stem cells to create human heart cells could b ...

Most animals, including humans, have bilateral symmetry, which means our bodies are pretty symmetrical. At least on the outside. On the inside, things are different. "If you look at our insides, we ...

A proposed international legal and ethical definition could address current challenges, with implications for improving IVF success rates. The ethical and legal challenges posed by embryology research ...