Child health experts are taking the unprecedented step of trying to contact 26,000 families across Wales to get a better understanding of how premature babies develop in the long term.
Dr Martin Edwards, one of those leading the study from Cardiff University, says there's been minimal research in this field: "This is an area of the Health Service that hasn't really been monitored or observed until now."
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Showers in the north will spread southeastwards overnight. Temperatures will be higher so not as chilly as list night.
Chilly start to Tuesday, turning into a largely fine and dry day.
Political Editor Adrian Masters was joined in the studio by assembly members Bethan Jenkins, Mick Antoniw and Suzy Davies.