What is the normal body temperature for a newborn baby under one month old?

Oct 12, 2022 Source: Cainiu Health
Dr. Xie Zixing
Introduction
For newborns under one month old, a normal body temperature measured under the armpit typically ranges from 36.2°C to 37.2°C. Body temperature in newborns can be measured in several ways, such as axillary (under the armpit), oral (in the mouth), or rectal (in the anus) measurements, and the values may vary depending on the method used. Generally, oral and rectal temperatures are slightly higher than axillary temperatures.

The normal body temperature for a newborn infant under one month old, measured under the armpit, typically ranges from 36.2°C to 37.2°C.

Body temperature in newborns can be measured in several ways, including under the armpit, orally, or rectally. Different methods yield different readings. Generally, oral and rectal temperatures are slightly higher than axillary (armpit) temperatures. If measured under the armpit, a temperature between 36.2°C and 37.2°C is generally considered normal. It's important to note that body temperature naturally fluctuates throughout the day, so measurements taken at different times may vary slightly, usually by no more than 1°C.

If an abnormal temperature reading is observed in a newborn, it does not necessarily indicate an underlying illness. Many factors can influence body temperature, such as emotional state, ambient room temperature, feeding, or infection. It is recommended to take multiple temperature readings to improve accuracy and properly rule out potential medical conditions.


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