Mother Mel was born a twin to her mother, who was also born a twin to her mother, who was also had a twin sister all those years ago.
Jessica and Clara Gwynne represent the fourth generation of twins in one family, at an estimated odds of four-billion-to-one.
Mother Mel describes the shock when she first found out at her 12 week scan:
“It was a bit of a shock really. Although deep down I think I’ve always known that me or my sister Sherrill would have twins.
“They did the scan and I could see on the screen they were looking at the one baby and I saw something else which was in the corner and I thought well there’s nothing else that could be round like that apart from another head.
“And I thought no, don’t be silly and then she moved it over and she went ‘and there’s twin two’.”
The twins will feature on Channel 4’s One Born Every Minute tonight.