article_snippet: ’s baby teeth made a surprise discover - Karen girls were mirror twins.
article_snippet: The rare condition, which is thought to occur in around 25 per cent of identical twins, refers to twins who are mirror images of one another.
article_snippet: Then mum mentioned it at one of our check-ups and that's when they said about mirror twins.
article_snippet: Some likened the twins to the twins.
article_snippet: our are twins, it’s a fact. '
article_snippet: Mirror twins, though rare are not unheard of and occur when a fertilised egg splits late.
article_snippet: Normally, eggs split around two or three days after fertilisation happens, causing identical twins.
article_snippet: However, if the split doesn’t occur until day seven, the split can lead to mirror twins.
article_snippet: 12 – cause conjoined twins.
article_snippet: Around a quarter of identical twins are thought to be mirror twins.
article_snippet: Yesterday Jane Denton, director of the Multiple Births Foundation, said that investigating mirror twins was difficult.
article_snippet: But our think this happens in about 25 per cent of monozygotic (identical) twins.
article_snippet: ‘Research indicates that in identical twins it is usual for the teeth to grow in the same place in the mouth, within a day or two of each other. '
article_snippet: But with mirror twins you may find that it will be on the other side of the mouth in one child, but in the same sort of pattern.