VBAC is generally safer with fewer complications than a repeated C-section, but failing during VBAC can impose more risks than choosing a C-section in the beginning. In rare cases, when attempts of VBAC fail, a uterine rupture may occur where your uterus tears open from the previous C-section wound. Women may suffer heavy blood loss under those situations and in the worst case, a hysterectomy (removal of the uterus) may be needed to stop the bleeding. But rest assured, uterine rupture occurs at a rate of lower than 1% of VBAC attempts.