Читать книгу Double Trouble: Twins and How to Survive Them - Emma Mahony - Страница 14

About a third of all identical twins are ‘mirror-image twins’. If the one egg that splits does so later in the pregnancy, after the seventh day, then sometimes the twins have mirror-image traits – such as one is left-handed, the other right-handed. As they grow, you might notice one sprouting a tooth on one side, while the other does so on the other side, or different hair whorls curling in opposite ways. No-one is exactly sure what causes this effect, but it all adds to the mythology surrounding identical twins.