Introduction: From a biomechanical perspective, progressive alterations in the body shape and weight distribution may have an effect on pregnant woman’s gait pattern. One can assume that the background of these changes is the ability of our species to adjust the function of the contro! system to a con­stantly changing external and internal environmental needs. Further­more, during pregnancy body composition, diet and level of physical ac­tivity, which are potential factors affecting the manner of walking, may change.

That is why, the purpose of the present study was to monitor the al­terations of gait of the expectant mother on the base of selected biome­chanical parameters as well as to observe her diet and level of physical activity during the whole pregnancy period.