I'm embarrassed to say that my 2yo DS3 is sleeping on the same mattress we bought 10.5 years ago for his oldest brother. 4 mo DD is probably going to sleep in our Graco PnP until DS3 is ready to move out. He's just too hard and too easily upset to do the transition now! But my question is this, if I wait until she is older than 6 months, can I still use my old mattress and avoid SIDS risks? Would you be comfortable with that? It isn't that I can't afford another mattress, I'm just not sure that the statistics bear that a new mattress will be necessary once she's past that critical 6 months mark. Does that make sense?
I do have to mention that she gave us quite a scare in the hospital. She turned blue and stopped breathing 3 times so I'm extra neurotic with her. Everything makes me nervous. I'm happy that she's made it to 4 months but I really want to make sure I do everything right.
TIA!
ETA: A better way to phrase it would be "At what point would you consider a baby beyond the risk of SIDS and would you use an older mattress at that time?"