Mysterious Mirror Twins

Announcement: the Curiosity Podcast is finally here! Subscribe on iTunes here, Google Play Music here and add the RSS feed to your favorite podcast player. If you love it please consider leaving us a review.

Identical twins occur when a single fertilized egg splits into two embryos in the first four to eight days. Mirror twins are believed to occur when this split happens between nine and 12 days, after the asymmetry is already established.

Share the knowledge!
Advertisement