OBJECTIVES: Our aim was to prove the effects of physiological changes during pregnancy on gait as a manifestation of dynamic posture. METHODS: Our prospective non-random study was performed at the Department of Obstetrics and Gynaecology, Medical School, University of Pécs between 2008-2009 involving forty-two women: twenty-one were in the first, second and third trimesters and twenty-one were non pregnant (control group). Exclusion criteria included: pathological pregnancy, severe musculoskeletal, internal and neurological diseases. Allocation of patients was non randomized. MS Excel 2003 software was used for evaluation, data processing of stabilometric measurement results and Questionnaires. Measurement of parameters was performed by stabilometer. Statistical data were calculated according to mean, standard deviation, T-test methods and  the results were considered to be relevant at p<0.05. RESULTS: The gait of pregnant women proved to be slower than that of the control group (p=0.046), but the duration of step-cycle decreased during the course of pregnancy. The duration of swing phase in the first trimester is shorter compared to the control group (p=0.040). The rate of double-limb support to the total step-cycle showed an increase (p=0.023) when comparing the third trimester with the control group. On examination of foot roll-over a significant difference was found (p=0.006) when comparing to the first trimester. The foot angle of pregnant women in the first trimester was bigger than that of the control group (p=0.029). Pregnant women’s step width in the first trimester was smaller as compared to the control group (p=0.002). Comparing step width of pregnant women in the first and third trimesters a significant increase was revealed (p=0.049). CONCLUSIONS: Our study revealed that gait kinematics changed during pregnancy and showed a difference as compared to the control group.