Hi I'm Nick Jaynes for About.com and these are the odds of having twins. I'll be using information found on about.com's multiples guide site.Among general populations, the chances of having twins in the 21st century are about 3 in 100, or about 3%. Your chances are better than ever; researchers have recorded an increase of nearly 60% since the early 1980s. The most recent statistics, part of a 2006 study by the National Center for Health Statistics show that twins represented 32.21 of every 1,000 births.You'll increase your odds of having twins/multiples if:Thanks for watching. If you'd like to learn more, please find us on the web at About.com.