There is no evidence I&#x27;ve found that <i>any</i> monitoring device improves SIDS outcomes, and there is evidence that it doesn&#x27;t. Forget about the smart onesie: it&#x27;s difficult to justify even classic baby monitors as a medical intervention.<p>The decline in SIDS over the last 2 decades tracks the education of parents not to put infants to sleep on their stomachs.