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While a vast amount of research has been done concerning the sleep of single babies, much less has focussed on multiples. Here we summarise the research which has been done.

Whilst Sudden Infant Death Syndrome (SIDS) is extremely rare, the rate is two- to four-times higher in twins, compared to singleton babies. This is likely to be because many more twins are born premature and/or at a low birth weight; factors which are associated with increased SIDS risk in all babies.

It is important that parents are aware of how the sleep environment of twins can affect SIDS risk, as well as its effect on babies’ sleep, and ease of night-time care.

Twins Trust, a charity focused on twins and multiple births, provide information for sleeping twins and multiples.