Tag Archives: pelvic pain

The sacroiliac joints are the connections between the pelvis with the sacrum at the base of the spine. They provide stability, act as a shock absorber for the spine and assist with load transfer between the spine and the lower extremities. Studies have shown that the sacroiliac joints can be a significant cause of biomechanical low back pain with an incidence as high as 27%. During pregnancy, due to the release of the hormone relaxin, the ligaments around the sacroiliac joints become looser to allow widening of the pelvis to facilitate delivery. Because of this, as well as increased lumbar lordosis, SI joint pain is common during pregnancy.