Women who underwent opportunistic bilateral salpingectomy (OBS) along with hysterectomy had an almost 80% lower risk of developing serous ovarian cancer compared with women who underwent hysterectomy alone. This fact was shown by a large retrospective cohort study. The study provided further evidence of a dramatic reduction in the risk of ovarian cancer by removing the fallopian tubes. Both tubal ligation and hysterectomy can reduce the likelihood of certain types of ovarian cancer. However, these surgeries are only recommended for valid medical reasons. A salpingectomy may be performed along with a hysterectomy to further reduce health risks. For women at high risk of ovarian cancer, a hysterectomy can be a preventative measure.