The Potential of Infrared Thermography for Early Pregnancy Diagnosis in Nili-Ravi Buffaloes

Abstract

This study was designed to explore the potential of infrared thermography (IRT) as an alternate approach for early pregnancy diagnosis in buffaloes. The surface temperature (ST) of different regions (eyes, muzzle, flanks, and vulva) was determined in 27 buffaloes using IRT from the day of artificial insemination (AI; Day 0), and measurement was repeated every fourth day until Day 24 post-AI. From all regions, the ST in each thermograph was recorded at three temperature values (maximum, average, minimum). Pregnancy status was confirmed through ultrasonography on Day 30, and animals were retrospectively grouped as pregnant or non-pregnant for analysis of thermographic data. In pregnant buffaloes, all three values of ST were significantly greater (p ≤ 0.05) for the left flank, while, in the left eye and vulva, only the maximum and average values were significantly greater. By contrast, the maximum ST of the muzzle was significantly lower (p ≤ 0.05) in pregnant buffaloes compared to non-pregnant buffaloes. However, the ST of the right eye and right flank did not show significant temperature variation at any value. These findings suggest that IRT has the potential to identify thermal changes associated with pregnancy in buffaloes at an early stage.

Keywords: buffalo; early pregnancy; infrared thermography; surface temperature.

Figure 1

Fisher’s pairwise comparison of infrared surface temperature for the muzzle region at all three values, i.e., maximum (A), average (B), and minimum (C), in pregnant and non-pregnant buffaloes on different experimental days.

Figure 2

Fisher’s pairwise comparison of maximum (A) and average (B) infrared surface temperature of the left flank region in pregnant and non-pregnant buffaloes on different experimental days.