cribs. parents can now rest easier while their newborns are sleeping thanks to strict new federal crib standards now in effect. >> we have the strongest crib safety rules in the world today. >> reporter: most significantly, drop-side cribs, models that have a side rail that can be raised and lowered, are no longer allowed to be manufactured or sold. >> the baby can get wedged between the mattress and this side. because it can detach and comeme loose and that's been the problem with the drop-sides. >> reporter: robert and susan lost their 6-month-old son bobby when he suffocated in a drop-side. >> after research we found that a lot of these cribs had caused injuries and deaths. >> reporter: in fact, at least 32 babies have been killed in drop-side cribs in the past decade. and in just the past five years, 7 million of the cribs have been recalled. >> now cribs need to be tested before they go to the market. rather than relying on recalls. >> reporter: besides stopping the manufacture and sale of drop-side cribs, mattress