Born minutes apart and with almost identical looks, there seems little to set Lauren and Hannah Bernaba apart from any other pair of newborn twins.
But the girls are the world’s first twins to be born on the same day to two different women.
First, biological mother Amy Bernaba gave birth to Lauren, weighing 7lb 10oz, then, half an hour later, surrogate mum Torry Keay delivered 7lb 3oz Hannah.
The double pregnancy happened after Mrs Bernaba and husband George had undergone IVF treatment for 12 years in an effort to conceive a baby brother or sister for their son Jeremy, now 15.
Eventually, doctors decided that 40-year- old Mrs Bernaba would almost certainly be unable to carry another baby because of a problem with her immune system.
So they tried an extremely unusual procedure, implanting eggs fertilised by Mr Bernaba’s sperm into her womb and also into surrogate Mrs Keay’s.
Mrs Keay became pregnant, and against all the odds so did Mrs Bernaba. Both women had straightforward pregnancies before giving birth on May 27 in neighbouring rooms in a Los Angeles hospital.