Mothers warned Swansea's Singleton Hospital neonatal ward full
Expectant mothers due to give birth in a Swansea hospital are being warned to ring before turning up because the neonatal department is full.
Only women in advanced stages of labour who cannot travel are being cared for at Singleton Hospital.
All others, including those in the early stages of labour, will be transferred to other hospitals where there are neonatal cots available.
Health bosses said the situation could remain "for a few days at least".
Abertawe Bro Morgannwg University Health Board said there were no cots available for newborn babies needing support.
It said: "Only pregnant women in advanced stages of labour - and who therefore cannot travel - are currently being cared for at Singleton Hospital.
"Others who are in the earlier stages of labour, or women who had a booked induction or caesarean section, are being transferred to alternative hospitals with available neonatal cots."
Where possible, facilities including the Princess of Wales Hospital in Bridgend and Glangwili Hospital in Carmarthen are being used as alternatives.
However, the health board added: "As neonatal cots are under huge pressure across south Wales, some mothers-to-be may need to go further afield.
"Any mothers who need supervision during transport will be offered an ambulance.
"The situation is constantly evolving, but the service is expected to remain under pressure for a few days at least."
Women due to give birth at Singleton who think they are beginning labour are advised to call the labour ward on 01792 205666.