Again: the dominant factor in reducing infant mortality in the US has been prenatal care. Infant mortality in the sense described upthread is not about SIDS.<p>The latter half of your comment is a bit hand-wavy. &quot;Purely&quot; because of adoption numbers? What does a &quot;smart onesie&quot; actually have to do with SIDS? Companies have been selling ever-more-complicated baby monitors to parents for years using fear of SIDS, but SIDS is not a problem of monitoring.