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.
1 the fibular bursa between the lateral (fibular) collateral ligament and the tendon of the biceps femoris. 2  the fibulopopliteal bursa between the fibular collateral ligament and the tendon of the popliteus.  and the subpopliteal recess (or bursa) between the tendon of the popliteus and the lateral condyle of the femur.