A judicial review gets underway today into a decision to downgrade A&E services at the Prince Phillip Hospital in Llanelli.
It comes after campaigners called on the High Court in Cardiff to look into how the decision was made.
The decision to close the neonatal unit at Withybush Hospital in Pembrokeshire will also be reviewed.
Hywel Dda Health Board's decision to restructure specialist neonatal care earlier this year, led to protests.
Local people say they're concerned that premature babies would have to leave the county and travel to Glangwili Hospital in Carmarthen.
Technology which could protect premature babies has been launched at Swansea's Singleton Hospital.
The Heart Rate Observation System (HERO) helps predict if a child is becoming ill.
Dr Sujoy Banerjee, a Consultant Neonatologist at the hospital, says it will help save lives.
Doctors at Singleton Hospital in Swansea believe a new piece of technology will save the lives of the most vulnerable premature babies.
Called HERO for short, the Heart Rate Observation System alerts doctors and nurses to the risks of a baby becoming ill in the next 24 hours by checking his or her heart rate.
The system checks for loss of variations in the baby's heart rate and then presents a score to clinicians every hour with the likelihood of the child becoming ill in the next 24 hours.
It's the first time anywhere in the country the computer has been used for this purpose.
Clinicians believe in the next decade around 20 more babies will survive because of the tool.
A Labour and a Conservative AM have joined forces to push for a intensive baby care centre to be based at Ysbyty Glan Clwyd in Bodelwyddan. Ann Jones and Darren Millar have put aside political differences to welcome the First Minister's decision to develop a neonatal care centre in North Wales.
The intervention overturns plans by Betsi Cadwaladr Health Board to send all seriously ill babies to Arrowe Park on the Wirral. Carwyn Jones says the new centre will treat the 'vast majority' of sick babies with the worst cases still treated in Cheshire.
Ysbyty Glan Clwyd is one of two possible locations along with Wrexham's Maelor Hospital. A decision's expected early next year. Ann Jones and Darren Millar have issued this joint statement:
The Welsh Conservatives have welcomed the First Minister's announcement of a neonatal care centre for North Wales. But they say it should be established as soon as possible.
Plaid Cymru has criticised the First Minister's announcement on plans for treating babies born in North Wales who need extra care. Carwyn Jones said he'd listened to advice and would develop a centre in the region. But the most serious cases would still be treated on the Wirral.
Plaid's Llyr Gruffydd says that means relying on the English health service the First Minister has criticised:
First Minister Carwyn Jones has announced plans to develop a new centre in North Wales to treat babies who need extra care. But he told AMs the most ill babies would still be sent to Arrowe Park on the Wirral for specialist treatment.
He also explained to AMs why he was rejecting proposals in an independent report to treat all babies needing extra care in the north.
The First Minister says steps will be taken to ensure there will be a neonatal care centre in North Wales in the future. Carwyn Jones says he's listened to independent advice on controversial health board plans to move neonatal services to Arrowe Park on the Wirral.
But he told AMs that Arrowe Park will continue to be used for specialist care even in the long term. Carwyn Jones said that a site will be chosen for a new neonatal care centre and announced shortly.
First Minister Carwyn Jones has been telling AMs why he has asked experts in neonatal care to advise him on whether North Wales could have a 'fully self sufficient' service of its own. But the Welsh Liberal Democrats claim that the review is being sabotaged.
North Wales AM Aled Roberts said Betsi Cadwaladr Health Board wants to transfer facilities from Wrexham Maelor Hospital, though Welsh Government sources say that won't be allowed to happen whilst the review is taking place.
And the Shadow Health Minister, Darren Millar, said that instead of an end to uncertainty, it was 'yet another review and a further delay' in decision making by the First Minister.
Carwyn Jones took responsibility for the decision because his previous health minister, Lesley Griffiths, is AM for Wrexham and had a potential conflict of interest over services at her local hospital.
First Minister Carwyn Jones has announced that the Royal College of Paediatrics and Child Health will review whether North Wales can eventually become 'fully self sufficient' in the delivery of specialised neonatal services. At present the sickest babies are treated in England.
Mr Jones had already said that plans for a formal arrangement with Arrowe Park Hospital on the Wirral must go ahead as an interim solution but he was asked if proposals to move other neonatal care from Wrexham to Ysbyty Glan Clwyd could be delayed so that options for the future were left open.
A Welsh Government source has since confirmed that nothing affecting neonatal care in Wrexham, Glan Clwyd and Ysbyty Gwynedd in Bangor should change until the outcome of the review is known. The First Minister expects to receive the report in September.