Fortunately for their 23-year-old mother, tell-tale features plus the ten-month-old triplets’ emerging personalities mean she for one has no trouble telling them apart.
‘When they were newborns it was quite hard to tell which one was which, but I never got them mixed up myself,’‘They’ve all got dark birthmarks between their eyebrows, but Roman’s is slightly darker than the others’, and Rohan has got a birthmark on his leg as well.
According to the Multiple Births Foundation, the only way to establish for certain whether twins or triplets are identical – known as zygosity determination – is usually DNA testing.
After consulting them, Miss Allen took cheek swabs from Roman, Rocco and Rohan and sent them off to a laboratory to be analysed – and earlier this month received the news that they are genetically identical.
I was surprised because I expected them to be non-identical,’ she said. ‘But then I’m normally the only one who can tell them apart, so that does explain a lot!’
The triplets get through around 130 nappies a week between them and four packs of baby wipes, while a pack of formula lasts about two days and the washing machine is run around three times a day.
As their father, Liam Tierney, 28, does not live with her, much of the day to day help comes from her sister Lauren, 17.