Scientists in the UK say they’ve pulled off a feat of genetic engineering: creating a “synthetic” mouse embryo without the need for egg or sperm cells. The embryos were created with stem cells instead ...

Scientists have created “synthetic” mouse embryos from stem cells without a dad’s sperm or a mom’s egg or womb. The lab-created embryos mirror a natural mouse embryo up to 8 ½ days after fertilization ...

For the first time, scientists have created baby mice from two males. This raises the distant possibility of using the same technique for people — although experts caution that very few mouse embryos ...

The stem-cell-derived embryos could shed new light on the earliest stages of human pregnancy. Mouse embryos recently generated from stem cells in a lab show more brain development than any synthetic ...