“Sixteen infants were monitored while they slept next to their mum’s chest and again when they slept alone in a cot next to her bed.

And the study revealed their hearts to be under three times as much stress when they slept alone compared to when they were bed-sharing.

Also, while in the cot, their sleep was disrupted and their brains were less likely to “cycle” or successfully switch from active sleep to quiet sleep.”