Effect of physical activity during pregnancy on mode of delivery

The objective of this study was to examine the effect of structured physical exercise programs during pregnancy on the course of labor and delivery. In the 16 RCTs that were included there were 3359 women. Women in exercise groups had a significantly reduced risk of cesarean delivery (relative risk, 0.85; 95% confidence interval [CI], 0.73-0.99). Birthweight was not significantly lower in exercise groups. The risk of instrumental delivery was similar among groups (relative risk, 1.00; 95% CI, 0.82-1.22). Data on Apgar score, episiotomy, epidural anesthesia, perineal tear, length of labor, and induction of labor were insufficient to draw conclusions. With the use of data from 11 studies (1668 women), the analysis showed that women in the exercise groups gained significantly less weight than women in control groups (mean difference, -1.13 kg; 95% CI, -1.49 to -0.78).

Structured physical exercise during pregnancy reduces the risk of cesarean delivery. This is an important finding to convince women to be active during their pregnancy and should prompt the physician to suggest physical exercise to pregnant women, when this is not contraindicated.