What is a normal heart rate for a newborn? My 5day old while sleep had one of 90bpm and it worried us. I hear 70-160 is normal but other times 100-160

100 to 180. Normal heart rate for most newborn is 100 to 180, and if it is less than 100 the baby needs to be examined by the childs pediatrician but you have to either establish the rate by feeling the pulse for full 1 minute or by auscultation of heart with a stethoscope and counting heart beats for full 60 minutes.