If SIDS is going to happen, it'll happen whether baby is in the crib or not. Only thing you can really do to "prevent" it is put the baby on his side to sleep. Idc what they say, "back to sleep" causes just as much of a problem as the newborn being on their tummy. Say you put the baby on his back and he spits up in his sleep... yes some of it will come out but he will still get choked on what doesn't come out. And also, sleeping with the baby in the bed with you is not a good idea, bc you could accidentally roll over on him or something like that.