Pregnancy can cause bad back pain because of two major causes. One, increased weight carried mainly in the front and two, increased hormones. The weight of a child changes the posture and strains lower back. The increased production of hormones causes a weakness in the ligaments and bones in the pelvis and back slide out of place. Montclair chiropractic is a holistic remedy for pain caused by pregnancy. Avoid unsafe, over-the-counter medication and find relief from your pain with holistic chiropractic.