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However the figure stands at 829 in Hywel Dda health board which covers west and parts of mid Wales and 280 in the Swansea Bay health board area.

Sharon Daniel, Hywel Dda University Health Board's director of nursing, quality and patient experience, said the health board would not be making reports public.

In response to both mothers, chief operating officer at Hywel Dda health board Andrew Carruthers said it was "constantly working to improve services" to ensure it sees as many of the young people who need help as soon as possible.

In Hywel Dda health board there had been a 12-fold increase in the number of children waiting more than a year for an autism assessment - from 194 children in 2019 to 2,391 in 2024.

Hywel Dda has also seen more than a 400% increase in the number of autism referrals received - 614 in 2019 compared with 3,326 in 2024.