In the earliest hours after fertilization, an embryo takes its first steps toward becoming a living organism by shedding maternal control and activating its own genetic program. This critical process, ...

A lot happens in the first month of human embryo development as a single cell morphs into multitudes. Yet despite its significance, this period is basically a “black box” to researchers, says stem ...

The sperm and the egg cell's nuclei compete for size directly after fertilization and this is necessary for proper embryonic ...

Descriptions of the embryo go back at least to the time of Aristotle, but it has only been since the late 19 th century and early 20 th century that advances in experimental approaches allowed ...

For the first time, a stem cell model has produced a structure resembling an early human embryo with a yolk-sac-like ...

Researchers at the Francis Crick Institute have developed a new stem cell model of the mature human amniotic sac, which replicates development of the tissues supporting the embryo from two to four ...

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A coalition of anti-abortion legislators is calling for an end to human embryonic stem cell research at the National ...