1 Lasts 5 years.  Potential hormone side effects. There's no estrogen, so typically Mirena is less noticeable than oral birth control (the pill). The way the hormone is released via Mirena is local, so typically women don't notice changes.
The lesser sciatic foramen is an opening (foramen) between the pelvis and the back of the thigh.The foramen is formed by the sacrotuberous ligament which runs between the sacrum and the ischial tuberosity and the sacrospinous ligament which runs between the sacrum and the ischial spine.he lesser sciatic foramen has the following boundaries: 1  Anterior: the tuberosity of the ischium. 2  Superior: the spine of the ischium and sacrospinous ligament. 3  Posterior: the sacrotuberous ligament.
The inguinal ligament supports the muscles that run inferior to its fibers, including the iliopsoas and pectineus muscles of the hip. It also supports the nerves and blood vessels of the leg as they pass through the groin, including the femoral artery, femoral vein, and femoral nerve. The support provided by the inguinal ligament is important to maintaining the flexibility of the hip region while allowing vital blood and nerve supply to the leg.