Monkey embryos containing human cells have been made in a laboratory, a study has confirmed. The research, by a US-Chinese team, has sparked fresh debate into the ethics of such experiments.

The development of human synthetic embryos was announced ... Meanwhile, scientists in China have implanted synthetic monkey embryos into female monkeys - although, all the pregnancies failed.

derived from a human embryo. Those cells were then transplanted into the right-side retina of a macular hole-plagued snow ...

Scientists are seeking permission to generate human embryonic stem cells to study disease by introducing human genetic material into an animal oocyte. This has raised ethical questions that centre ...

This worked slightly better, with 113 cloned rhesus monkey embryos resulting in 11 implantations ... that they can use these ...

They cloned a human embryo to derive embryonic stem cells ... Scientists Reach Breakthrough in Cloning Monkey Embryos Oregon scientists announced the successful cloning of monkey embryos this ...