Why newborn heart rate is more than 100 which is normal ?

Newborn heart rate: Most fetal heart rates before birth are normally more than 100. This helps to indicate fetal well being before birth. After birth, most newborn heart rates are less than 100 when you can verify the well being of the newborn in a cooler environment. Because the fetus inside the uterus has a slight elevation of temperature, this contributes to fetal heart rate more than 100.