What To Do If Baby Oxygen Is Low Owlet. It is normal for oxygen levels to fluctuate throughout the day, as well as with activity. These monitors can come with a variety of features, so it’s important to do your research before buying one. At the same time, the heartbeat is something you wouldn’t want to overlook as a. The owlet dream sock is an afoot monitor that helps parents know when their baby has an irregular heart rate, respiratory issues, or reduced oxygen levels. I usually don't see the saturation level go below 97%. Whenever baby’s oxygen saturation or heart rate are below or above the preset safe levels, the base station will change its color from green to red and your owlet app will sound the alarm too. I have a 3 week old and i've noticed a couple of nights that my baby's oxygen sats are dipping into the low 90s and even into high 80s.