These babies are identical twins, but their mom has no trouble telling them apart. “People say, ‘The doctors lied to you. Your twins aren’t identical,’” Danielle Marple of Venice, Florida, tells TODAY ...

I never believed in love at first sight until I met my now-husband. I couldn't recognize him from his identical twin brother over the phone. We ended up having fraternal twins, and I got to experience ...

Study of 2,000 twins shows teenage body dissatisfaction predicts adult depression and eating disorders. Social pressure, ...

The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health, as well as traits and behaviors.

Parents and teachers are very concerned with twins and twin relations. While there are some helpful guidelines in dealing with such issues, I would argue that most decisions should be made on a ...