They are multiple physical changes to a women’s body as related to pregnancy. The center of gravity changes, there is more pressure on the organs, and there is increased weight to be carried. All of these in a relatively short period often leads to back pain, pelvic pain, and urinary incontinence.
During pregnancy even before the bump starts showing, the body goes through major changes. The posture and the way the body moves change, the weight going through the joints increases, and the muscles, ligaments, and soft tissues get more flexible and elastic to allow the pelvis to stretch to accommodate the baby. All of these changes happen due to hormonal changes and they are very important.