Blood-forming stem cells found in bone marrow are the life-saving component used in bone marrow transplants. However, suitable donors cannot be found in many cases. A new study reveals how the human ...

Mature egg cells, or oocytes, are essential for fertilization in assisted reproductive technologies. However, some 'denuded' oocytes, or those lacking the protective granulosa cell layer, fail to ...

Stem cell-based embryo models, which recapitulate symmetry breaking, pattern formation and tissue morphogenesis during early development, provide promising experimental tools to study the development ...

Men have nipples because embryos are sexually neutral for their first six weeks. Here's the developmental blueprint behind ...

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 ...

Researchers at the Francis Crick Institute have revealed insight into why embryos erase a key epigenetic mark during early development, suggesting this may have evolved to help form a placenta.

Scientists have created mouse embryos in a dish, and it could one day help families hoping to get pregnant, according to a new study. After 10 years of research, scientists created a synthetic mouse ...

Scientists have created an embryo-like structure using monkey embryonic stem cells for the first time, part of an effort to better understand early human development and organ formation. The ...

A base editor rewrote a single DNA letter while editing human embryos, and every chromosome held even as mosaicism keeps a ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

A preprint describing genetically edited human embryos is raising concerns among scientists that the U.S. is becoming more ...