Roughly 50 years ago, scientists pursued a line of inquiry about the creation and development of human embryos in the lab. As of now, the extent of this research is limited to the first 14 days ...

The majority of fertilized eggs die and are resorbed into the body. ZEISS Microscopy/Flickr, CC BY-SA As an evolutionary biologist whose career has focused on how embryos develop in a wide variety of ...

Scientists are exploring ways to mimic the origins of human life without two fundamental components: sperm and egg. They are coaxing clusters of stem cells – programmable cells that can transform into ...

The embryos were created in 1994, while the expectant father was still a toddler, and donated via a Christian “embryo adoption” agency. A baby boy born over the weekend holds the new record for the ...