Читать книгу Double Trouble: Twins and How to Survive Them - Emma Mahony - Страница 10

Girls and boys cannot be identical. Nobody mistakes a brother and sister for each other, so why do people mistake boy/girl twins? Statistics¹ show the national average for boy/girl twins to be 33 per cent of all fraternal twin births. Expect around 100 per cent of the population to ask you ‘Why don’t they look the same?’ Women are more likely to have fraternal twins if there is any incidence of twins on their mother’s side (not their father’s).