The female perineum is diamond shape.it is bounded anteriorly by pubic symphysis , posteriorly by tips of coccyx and anteriorly both sides bounded by pubic arch.ischial tuberosity situated both lateral side of the perineum.sacrotuberous ligaments situated lateraly both sides of perineum posteriorly.two ischial tuberosity devide by horizontal line and form into two triangle.anterior portion is called urogenital triangle and posterior portion is called anal triangle.