Are twins more common these days? Or are you just seeing more twins because you have twins?

According to the latest national census report, there are more twins born now then ever before!

Here are the latest facts

  • The number of multiple births in the United States is at an all time high at 1 in 29 births.
  • Twins now represent one in every 31 births. That is one child in every average school classroom!
  • Triplets and higher order multiples account for 1 in 565 births.
  • Over the past two decades, the rate of twin births has increased by 70% and the rate of high order multiples has increased by 300%!

So what happened?

  • In the 1980s, modern fertility treatments emerged. More women than ever are using fertility enhancing therapies. These treatments dramatically increase a woman’s chance of having twins.
  • Women are having children later than they used to. From 1990 to 2004, the birth rate for women ages 30-34, 35-39, and 40-44 increased 18%, 43%, and 62% respectively. For women 45-49 years of age, the birth rate rose by an astounding 150%!
  • Older women have more twins because they naturally have an increased tendency to release more than one egg each month and/or they are more likely to use fertility enhancing treatments.

What are the chances of having twins?

  • 3% or one out of every 33 births for women under 35 years of age.
  • About 6% or 1 in 18 births for women over 35 years old.
  • 20% or 1 in 5 births for women 45-49 years of age.
  • For women 50-54, one of every 2 births will be a multiple delivery. In other words, these women have a 50% chance of having twins or supertwins!

As maternal age increases and technologies in reproductive medicine progress, the number of twins in this nation will continue to skyrocket.

Article by .

Khanh-Van Le-Bucklin