INTRODUCTION: Pregnancy comprises a period of 41 weeks, in which the female body undergoes several physiological, hormonal and anatomical changes that can generate changes in skin temperature. OBJECTIVE: To describe the thermal profile of pregnant women during the first, second and third trimester of pregnancy. METHOD: This is a cross-sectional observational study. A total of 104 women participated, divided into three groups: first trimester group (1 TG, n = 25), second trimester group (2 TG, n = 27), third trimester group (3 TG, n = 26), and non-pregnant control group (CG, n = 26). All underwent thermographic evaluations using a thermographic camera model E54-EST, and anthropometric measurements of abdominal circumference and diastasis. RESULTS: It was observed that the average skin temperature of pregnant women in the first trimester is higher than the average skin temperature of pregnant women in the third trimester of pregnancy (P <
0.05)
the abdominal temperature of pregnant women in the first trimester tends to be higher than that of pregnant women in the second and third trimesters (P <
0.05)
and the breast skin temperature of pregnant women is higher than that of non-pregnant women (P <
0.05). Furthermore, there is a tendency for negative correlations between the average skin temperature and the temperature of the abdominal and diastasis regions with fetal development measures. CONCLUSION: It is generally observed that there are differences in the skin temperatures of regions such as the breast between pregnant women and non-pregnant women, as well as a tendency for higher abdominal temperatures in pregnant women in the first trimester compared to those in the third trimester.