Insider caught up with Anna and Lucy DeCinque, from TLC's "Extreme Sisters." This season, they consider motherhood with their shared fiancé.

At the core of many people’s fascination with twins is the belief that, at least in the case of identicals, their minds are as similar as are their bodies. There is both truth and conjecture in this ...

A pair of identical twins have revealed how they plan to share a boyfriend and live together as a "throuple". A pair of identical twins have revealed how they plan to share a boyfriend and live ...

It makes sense that identical twins would have the exact same DNA, right? Spoiler alert: Not always! Here's why. Identical twins (also called monozygotic or MZ twins) are conceived when a single sperm ...

From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's "Twinnies" Paula and Brigette Powers, identical siblings have long inspired ...

Destinee and Dynastiee are identical twins who need to lose weight. Combined they weigh 1,200 pounds and seek help from bariatric surgeon, Dr. Younan Nowzaradan. “The 6000-lb. Diaries with Dr. Now” ...