outlet Irregular Consisting of two triangles It is bounded by a Posteriorly: the tip of sacrum o Laterally ischial tuberosities sacrotuberous ligaments a Anteriorly: the lower border of pubis symphysisoutlet Irregular Consisting of two triangles It is bounded by ❑ Posteriorly: the tip of sacrum ❑ Laterally : ischial tuberosities sacrotuberous ligaments ❑ Anteriorly:the lower border of pubis symphysis