In mammals, reproductive processes are sensitive to changes in temperature, especially hyperthermia, which reduces both quality and quantity of sperm in males and decreases fertility in females [1]. The ability of an embryo to respond to changes in its environment is limited during the first cleavage divisions, when most of the embryonic genome is inactive. This period of low transcriptional activity creates a window in which embryos are particularly sensitive to certain forms of stress. One of the changes in the maternal environment