answer:I haven’t thank goodness. But, I do remember seeing a special kind of baby monitor, that Mama can place under the baby’s mattress. It’s a highly sensitive motion detector. If it stops sensing motion of any kind – that is, something as faint as the inhale-exhale of the baby, the klaxons will sound and Mama and Baby will most likely be awake for some time. The worst reviews I’ve read is that sometimes people forget to turn it off after the baby wakes up, and the siren goes off after they take the kid out of the bed. Fair trade for peace of mind, in my opinion. here’s one