Pregnancy-related back pain commonly develops during the second trimester of pregnancy. This pain results from pressure from the foetus on different areas of the body, including the SIJ joints (the intersection of the pelvis and spine), the lumbar spine and the pelvic rim. The increase in pain leads to decreased mobility, affecting the pregnancy journey and postpartum period. This pain also stems from changes in hormones and posture, muscle separation, stress and weight gain.