A preschool worker has vented her frustration online after a mother of identical twin girls changed their hairstyles upon being told that was how they could be told apart. However, after telling their mother about this difference, the woman immediately changed the twins' hairstyles. She might think it makes her special or an extra good mom.”How Do Parents Tell Identical Twins Apart? According to Twiniversity, parents of identical twins often devise practical methods to distinguish them, especially in early childhood. I have identical girls with no type of birthmarks.