At 20 weeks pregnant with twins, Andrea Goodrich was given the heartbreaking news that losing both babies seemed inevitable.

Yesterday, however, she was cradling two healthy daughters after one saved the other’s life before they were born.

Scans had revealed that one of the girls, Kiki, had a heart problem and fluid was leaking from the placenta.

But miraculously her sister Nico positioned herself so low in the womb that she acted as a plug, preventing a miscarriage or an infection.

‘We truly believe she acted as her sister’s guardian angel,’ said Mrs Goodrich, 39, from Camberley, Surrey.