Is lower back pain a sign of pregnancy?
If you experience lower back soreness along with early pregnancy symptoms, it may indicate pregnancy; if there are no early pregnancy symptoms, it is less likely to be pregnancy. The analysis is as follows:

In early pregnancy, hormonal changes—particularly increased progesterone secretion—can cause relaxation of the uterine smooth muscle and exert traction on surrounding tissues and ligaments, including those in the lower back. This pulling effect may lead to lower back soreness. As the uterus gradually enlarges, the traction on the lower back becomes more pronounced, further worsening the discomfort. If accompanied by other early signs of pregnancy, such as delayed menstruation, nausea, vomiting, or breast tenderness, it is likely that you are pregnant.
If early pregnancy symptoms are absent, the cause may not be pregnancy. Conditions such as lumbar spine disorders, lumbar osteophyte formation, or spondylolisthesis can also cause lower back pain. Maintaining poor posture over long periods—such as prolonged sitting, standing, or bending—may lead to strain in the lower back muscles and result in soreness. It is recommended to visit a hospital for an accurate diagnosis and follow medical advice for appropriate treatment.
In daily life, it is advisable to get adequate rest and avoid excessive physical strain.