Sudden Infant Death Syndrome (SIDS) is rare, but parents worry a lot about it. Home apnea monitors track the breathing and heart rate of sleeping babies. An alarm goes off if a baby’s breathing stops briefly (apnea) or if the heart rate is unusually slow. This monitor might sound like a good idea to concerned parents. But most newborns do not need a monitor. Home apnea monitors give little or no protection from SIDS.