CTV News Channel
Getting pregnant while already carrying a baby is so rare that one 2008 study found fewer than 10 recorded cases in the world.
More twins -- almost one in 40 children -- are being born than ever before, according to research published Friday, citing the rapid rise in medically assisted reproduction as a major factor.
If you're an identical twin who's always resisted being called a clone of your sibling, scientists say you have a point. New research shows identical twins are not exactly genetically the same.
A Sri Lankan attempt to set a world record for the largest gathering of twins may have failed after an unexpectedly large turnout overwhelmed organizers who vowed to try again.
Doctors told a Florida woman she had a better chance of winning the lottery than of giving birth to two sets of twins in the same year.
As a pair of identical twin girls entered the world, they were greeted in the delivery room by two people who had been there before: Tara and Tori, the identical twin nurses working in their delivery room.
An Alberta couple who have started raising three sets of paternal twins in the past 10 years say they have no plans to try for a fourth.
The world's largest gathering of twins returns this summer, with thousands of siblings -- all coming with carbon copies of each other -- expected to descend on a city called Twinsburg.
A pair of Australian twins had researchers scratching their heads when it was discovered they were neither identical nor fraternal, but semi-identical siblings.
Two sets of 24-year-old identical twins had their first date together, became engaged at the same time and are now preparing to tie the knot in Michigan this weekend.
Guests gathered from as far away as China and Australia to help two identical twin sisters celebrate their centennial near Ottawa on Tuesday.