In general, it is assumed that non-labor contractions are harmless
to the fetus. The scientific background for this assumption is
scarce as most studies have focused on labor contractions or
induced uterine contractions. In a few studies on spontaneous nonlabor
contractions in normal pregnancies, Doppler flow examinations
have demonstrated increased pulsatility index in the uterine
arteries but not in the umbilical arteries and the internal carotic
arteries [