These identical twins had people confused. In 2015, Amy and Becky Glass were 47-year-olds completely addicted to being identical twins ...

These twins are the same sex and share the same genes ... Half-identical or polar body twins are born together. However, the mother’s egg splits in two and each half is fertilized by sperm ...

These babies share somewhere between 50% of the same DNA (like dizygotic twins) and 100% (like monozygotic twins). Scientists have discovered that a phenomenon called polar body twinning is ...

These twin share the same genetic material ... Some researchers speculate about a third category: polar body twins or half-identical twins. This rare phenomenon might occur when an egg splits ...

Fertility doctors have unveiled extraordinary plans to create an IVF baby with a twin that could be plundered for spare body parts. Scientists want to split embryos just after fertilisation ...

“It wasn’t in my mind that it could be twins, not at all. I just thought I knew my own body,” Victoria said. “We don’t have any twins in our families, so I didn’t even think it would ...

Meanwhile, someone with the same face, body, and DNA was back on Earth: his identical twin, Mark Kelly. Scott and Mark are the only twin NASA astronauts in history. Separated by 250 miles of space ...

The Jim twins had the same height and weight, which is common. But they also had a number of similar quirks and life choices, as recorded by the Minnesota Center for Twin and Family Research.