Lower Back Pain in Pregnancy Lower back pain can be a common symptom during early pregnancy, including around week 5. This can be attributed to various factors related to the changes in the body as it adjusts to the pregnancy. Some possible reasons for lower back pain in early pregnancy include: Hormonal Changes The body experiences hormonal changes during pregnancy, including increased levels of progesterone, which can contribute to relaxation of muscles and ligaments, potentially leading to back pain. Changes in Posture As the uterus begins to grow, it can shift the center of gravity, leading to changes in posture. This change may affect the lower back and contribute to discomfort. Pelvic Girdle Pain Increased hormone levels can also affect the joints and ligaments in the pelvic area, potentially causing pain in the lower back. Stress on Muscles The growing uterus can put additional stress on the muscles of the lower back, leading to discomfort. ...