The benefit of external cephalic version with tocolysis as a routine procedure in late pregnancy

Abstract

The effectiveness of external cephalic version with tocolysis when routinely used in the 37th week of gestation is reported. The procedure had earlier been ruled out in our department, was found effective in a prospective study, and afterwards settled as a routine. Among 1038 women with single breech presentation, 882 could be offered an attempt of external cephalic version during the period 1982-1988. Attempt of version was carried out in 316 women resulting in a vertex presentation at delivery in 100. The success rate on average was 35%. The estimated reduction of breech deliveries was 100/1038 = 9.6%. As the mean caesarean section rate in women with breech presentation was 81% during the period studied, the estimated reduction in the number of caesarean sections during those seven years was 81. Thus the total caesarean section rate (11.3%) was estimated to be reduced by 0.4%. No immediate serious complications were associated with the procedure. Two cases of intra-uterine fetal death occurred 2 and 5 weeks, respectively, after successful, uncomplicated version to vertex presentation. No obvious connection with the external cephalic version could be demonstrated. The effectiveness of version as a routine procedure is less than expected from reports of prospective trials of external cephalic version carried out by a few investigators, but the results may realistically illustrate what is achieved in the long term.