In the past three decades the number of twins born in the U.S. has risen by more than 75 percent, mostly due to increased use of fertility treatments. As these twins have grown into teenagers and adults, they face many challenges that "singletons" may not, like learning to be an individual while being part of a twosome. Many of us romanticize the life of a twin, and think they are blessed with someone who understands them deeply. But what about twins who don't like each other? Or those who have become so entwined, they struggle to make any changes in their lives?
The Reality Behind the Twin Mystique
Nancy Segal, professor of psychology and director of the Twin Studies Center at California State University, Fullerton and author of "Born Together -- Reared Apart: The Landmark Minnesota Twin Study"
Joan Friedman, psychotherapist and author of "The Same but Different: How Twins Can Live, Love, and Learn to Be Individuals"