[Effect of exercise during pregnancy on uterine contractions]

External tocometry was performed one hour before and one hour after pregnancy gymnastics in 102 healthy pregnant women between 25th and 38th gestational week. There were no statistically significant differences in the number of contractions. The short-term increase in frequency of contraction was without any clinical importance. No prolongation of the duration of contractions could be observed with advanced pregnancy. 34 per cent of the women were delivered in the 41st gestational week, 32 per cent before the 40th one. In case of threatening premature delivery gymnastics are contraindicated with exclusion of relaxation exercises. They are allowed only in case that a good attitude of contractions before and after gymnastics can be demonstrated by objective external tocometry.