An investigation has been launched after a woman lost her baby as she waited two hours for an ambulance.
She was told at the Ysbyty Ystrad Fawr that she would require a Caesarian section which would need to take place at the Royal Gwent hospital in Newport.
The Aneurin Bevan Health Board have told ITV Wales that they have begun a joint investigation with the Welsh Ambulance Service.
The events took place on Thursday 1st November.
The Health Minister Lesley Griffiths has said she wants the 'very distressing case' to be investigated thoroughly.