The aim of the study was evaluation of the frequency of urinary incontinence occurrence in pregnancy and the identification of the systemic and obstetric causes. The study was carried out on the turn of January to February among 146 women in childbirth staying at maternity wards of the Clinical Hospital and District Hospital in Lublin. It was stated, that incontinence problems in pregnancy were reported by 79.5% of the surveyed women. The symptoms of urinary incontinence in pregnancy were reported by 37.7% of women, and 38.2% of women declared to be unable to stop the stream of urine. The first symptoms of urinary stress incontinence occurred in 3.6% women before first pregnancy, in 12.7% women they occurred in the former pregnancy, and in 5.5% after previous delivery. In women with symptoms of urinary stress incontinence the BMI index was higher than in the rest of the studied group. This study revealed the correlation p < 0.05 between the occurrence of urine incontinence the profession (weight lifting).