Normal range and lateral symmetry in the skin temperature profile of pregnant women

• This study defines the pattern of skin temperature in the pregnant human body.
• A negative correlation between BMI and skin temperature in the pregnant women was verified.
• Age showed a strong influence on the skin temperature.
• In normal pregnant subjects, the skin temperature is symmetrically distributed.
• Thermography could represent an important tool for diagnosis in the gestational period.

Body skin temperature is a useful parameter for diagnosing diseases and infrared thermography can be a powerful tool in providing important information to detect body temperature changes in a noninvasive way. The aim of this work was to study the pattern of skin temperature during pregnancy, to establish skin temperature reference values and to find correlations between these and the pregnant population characteristics. Sixty-one healthy pregnant women (mean age 30.6 ± 5.1 years) in the 8th–40th gestational week with normal pregnancies were examined in 31 regions of interest (ROI). The ROIs were defined all over the body in order to determine the most influenced by factors such as age or body mass index (BMI). The results obtained in this work highlight that in normal pregnant women the skin temperature is symmetrically distributed, with the symmetrical areas differing less than 0.5°C, with a mean value of 0.25±0.23°C. This study identified a significant negative correlation between the BMI and temperature. Age has been shown to have great influence on the skin temperature, with a significant increase of temperature observed with age. This work explores a novel medical application of infrared thermography and provides a characterization of thermal skin profile in human pregnancy for a large set of ROIs while also evaluating the effects of age and BMI.