The second trimester is when you may start seeing an increase in low back pain, particularly around the SI Joint. This is due to relaxin’s effect on the SI joint, causing it to loosen and become less stable as well as later in this trimester the postural shifts in the low back due to increased load of baby.
But wait, what is my SI Joint? This is the joint between the sacrum (the heart shaped bone at the base of the spine) and the illium bones (the pelvic bones that come around and meet either side of the sacrum in the low back). This is considered a joint because it is held together my connective tissue (tendons and ligaments) and the sacrum can move slightly in relationship to the pelvic bones.
Wisdom and insight with a dash of humor to help guide you on your journey through motherhood.