Infant Stomach Sleeping

I have seen and heard the subject of infant stomach sleeping popup online, in personal conversations and even in yoga class recently. Looking through online threads, researching and as part of real life conversations it is clear there is no "answer." I often wonder when an infants rolls over in their sleep if it is a sort of early instinct to protect the most vulnerable part of their bodies? Infant stomach sleeping became a big no no in the early 90s and since that time we have seen a drop in SIDS. However, there is no direct scientific explanation only that stomach sleeping can be a factor in SIDS.
According to babycenter.com, Babies between 1 and 4 months old are most at risk for sudden infant death syndrome (SIDS), and 90 percent of cases occur in babies under the age of 6 months. By definition, SIDS doesn't happen after a child's first birthday. ... Another cause of sleep-related deaths in babies is accidental suffocation.
What are parents to do? It looks like a quiet questioning and revolt to the stomach sleeping guidelines has been happening since the early 2000s. Often parents make choices based somewhere between science, knowing their baby and myth. Ultimately it comes down to doing your research, talking to pediatrician and having sleepless nights.