Three specifically made computational programs are described. These programs were developed in order to delimitate and analyze the accelerometric signals generated in relation to the pelvic thrusting performed by the male rat during its mounting, intromission, and ejaculation copulatory responses. This methodology has allowed us to perform quantitative analysis, not only about duration and frequency but also about amplitude or vigor of pelvic thrusting trains. We found that during long ejaculation, the extravaginal pelvic movement had a significantly higher amplitude than that of the intravaginal movements.