President Bush, saying he wanted to “proceed with great care,” announced in a national address on August 9 that he would allow federal funding of an existing 60 stem-cell lines but would not permit ...

Monozygotic twinning itself after elective single embryo transfer is uncommon, occurring in no more than roughly 3% of cases.

The number of twins and triplets born can vary significantly between IVF clinics, new data shows, but experts warn that ...

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 ...

“This paper really marks the beginning of a new era for biomedical research,” Xiong Zhi-Qi, a researcher studying brain disease at the ION but who was not involved in the work, tells Nature. These ...