Medical research

In a dish, a mouse, crafted from stem cells, begins to form

The tiny mouse embryo has a heart that beats. Its muscles, blood vessels, gut and nervous system are beginning to develop. But this embryo is unusual: It was made in a lab, out of mouse embryonic stem cells, and represents ...

Medical research

Scientists create embryos with cells from monkeys, humans

Researchers have successfully introduced human stem cells into monkey embryos in the lab, creating short-lived hybrid organisms that could prove an important step in growing human transplant organs from livestock or creating ...

Medical research

Pre-embryos made in lab could spur research, ethics debates

For the first time, scientists have used human cells to make structures that mimic the earliest stages of development, which they say will pave the way for more research without running afoul of restrictions on using real ...

Obstetrics & gynaecology

Extend 14-day human embryo research limit to 28 days, urges ethicist

It's time to extend the legal limit on human embryo research from 14 to 28 days, because technology and knowledge have moved on during the 40 years since it was introduced, urges a leading ethicist in the Journal of Medical ...

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