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

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 ...

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

“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 ...