The hotels also began stocking baby monitors and toddler bed rails.

WSJ: Rosewood Hotels, Hyatt, Wequassett Resort Boost Amenities for Young Children

Many makers sell optional conversion kits costing as much as a couple hundred dollars, which turn the crib into a toddler bed, often partially surrounded by rails and low enough to get in and out of without help.

WSJ: Manufacturers Discuss Safety Features of the 'Modern' Crib

Sally Dent from Belper in Derbyshire, awoke to find toddler Riley unconscious in bed next to her on 13 March 2012.

BBC: Shaun Binfield and Sally Dent

The incident was witnessed by a toddler who had been lying in bed with Ms Hughes and also by a boy of six.

BBC: 'No fault' in insane killer James Bryceland case