Effect of vibroacoustic stimulation on fetal meconium passage in labor.

It has been suggested that vibroacoustic stimulation might be stressful to the fetus. The present study was designed to evaluate whether the stimulus induces passage of meconium in labor. Patients in labor at term with healthy fetuses and intact membranes were randomized to a vibroacoustic stimulation or sham test. The incidence of meconium was the same in both groups. Pregnancy outcome variables were also similar in both groups. In conclusion, vibroacoustic stimulation does not increase the incidence of meconium passage of labor of healthy fetuses.