13 cases of hysterectomy carried out to stop bleeding immediately after delivery have been studied. Among these there were : 5 cases of placenta accreta which confirmed histologically. 4 cases of uterine inertia. 2 cases of failure of coagulation, one of which occurred after there had been a retro-placental haematoma and 2 ruptured uteri. After analysing the clinical circumstances surrounding these 13 cases and the technical details in carrying out hysterectomy on the gravid uterus, the authors studied conservative surgical measures that could be used to deal with post-partum uterine haemorrhage : the hypogastric arteries on the one hand the efferent arteries supplying the uterus on the other hand can be ligated. The technique for this last procedure is illustrated in one case.