I’ve read in a few places that 25% of identical twins are mirror image What Causes Mirror Imagine? Since there is no DNA test to conclude if twins are actually mirror image or not, there isn’t an exact way to know what percentage of twins are mirror image. No, there is no DNA test to determine if your twins are mirror image. Related: Children’s Books About Twins Is There a Test for Mirror Image Twins? in extreme cases of mirror imaging, internal organs.Characteristics of Mirror Image TwinsĪs I mentioned earlier, mirror image twins are exact reflections of each other.įeatures that can be on opposite sides include: With this information, and based on their physical appearance, they are mirror image twins. We finally got a DNA test done after a year and found out that Josie and Margo are indeed identical twins. Mirror Image Twins Are a Type of Identical Twin Since they’ve come home from the NICU we’ve had to have follow-up appointments with the pediatric ophthalmologist to monitor their cataracts, but so far they aren’t interfering with their vision. It turns out that marks in their eyes were actually cataracts and nothing to worry about. It was my mom who first mentioned that they might be mirror image twins and I started researching about the different types of twins. Since this was something they were born with and it wasn’t identical, I figured they were probably fraternal.
The really crazy thing was that they were on opposite sides. They described them to us as cloudy starbursts inside their pupil. Fraternal twins can look similar and identical twins can look different.Įven though identical twins have literally the exact same DNA, their physical features are affected by the environment, including how they are positioned in the womb.Įarly in their NICU, we had a visit by a pediatric ophthalmologist, because they had what looked like birthmarks inside their pupil. However, since they were di di twins, the likelihood of them being fraternal was higher than identical.
My husband and I would visit them in the NICU and just stare at their little faces in awe.
Other than the weight difference though…they looked VERY similar. There was a weight difference of almost a pound, so it made it pretty easy to tell the girls apart. Since they were in the NICU after they were born, it wasn’t a high priority for us to find out if they were identical or fraternal right away. The only way to know for sure with di di twins is to do a DNA test. Since they are di di twins (each twin had their own amniotic sac and placenta), and are both girls, they could be either. When our twins were born, we had no idea if they were identical or fraternal. I find mirror twins to be absolutely fascinating (spoiler alert- probably because my identical twin girls are mirror image twins!) and I’ll get into the details of mirror image twins below. Certain physical characteristics are on opposite sides.įor example, if one twin has a birthmark on the left side of their body, their twin will have it on the right side. Mirror image twins is a term used to describe identical twins who’s features are exact reflections of each other.
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