Until what age should I follow safe sleep advice?
Short answer: For every sleep until your baby is 12 months old, or 12 months from the due date for premature or low-birthweight babies.
Here is the detail behind that answer, taken from current UK guidance from the NHS and the Lullaby Trust.
Things to check
- Check the mattress size listed for the frame. 140 x 70cm is common, but not universal.
- Keep every conversion panel, bolt and instruction sheet for the toddler-bed stage.
- Look at adjustable base heights, teething rails and any matching furniture.
What the guidance says
- Follow safer-sleep advice for every sleep until your baby is 12 months old (12 months from the due date for premature babies).
Related questions
What is a cot bed?
A cot with removable sides and ends that converts into a toddler bed, most often taking a 140 x 70cm mattress.
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Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Can a 9 month old still sleep in a bedside crib?What are the ABCs of safe sleep?Where should I put a travel cot in the nursery?Can a 6 month old sleep with a soft toy?Travel cots on holiday: a safe sleep checklistTwins safe sleep quizAll safe sleep and sleep spaces advice →
Sources
- The Lullaby Trust: Safer sleep advice (accessed 2026-10-21)
General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.