27th May 2021

There’s lots to learn about when you become a parent of twins, triplets or more but what about the fun facts that you can share.

Here are 7 facts about identical twins to wow friends and family with

  • Identical twins occur in about one-third of multiple pregnancies.
  • They are known as monozygotic twins, where a single egg is fertilised then splits into two (or, very rarely, three or more) creating identical babies with the same genes, physical features and sex. 
  • Identical twins do not have identical finger-prints.
  • Identical twins don’t run in families but fraternal (non-identical twins) can. 
  • There is a sub-section of identical twins known as “mirror twins”. Rather than their appearances being identical, these twins are the mirror image of each other. So, for example, one child could have their hair parting on the left and the other child on the right. They may also have birthmarks on opposite sides of their body or be right and left-handed.
  • Identical twins may or may not share a placenta.
  • The only way to tell for sure about zygosity once twins are born is with a DNA test.

Want some more facts about twins? Check out our other facts blog here.