OXT and pulmonary arterial hypertension: Also, during the third stage of labor, the utility of using oxytocin or other uterotonics to prevent PPH (prophylactic use) is described.28Only three included studies reported data about using oxytocin or other uterotonics to prevent it.21, 24, 25However, these data are not sufficiently presented to obtain the proportion of use of prophylactic uterotonics according to the presence of PPH or FM.