This exercise strengthens your lower back and pelvis. It is for use during the first 4 months of pregnancy. After this point, lying on your back is not recommended, because it can cause blood circulation problems for you and your fetus.

• Lie on your back.
• Keep your knees relaxed.
• Tighten your belly and buttocks muscles.
• At the same time, gently shift your pelvis upward. This should flatten the curve in your back.
• Hold for 6 seconds and then relax.
• Gradually increase the number of tilts you do each day, to your comfort level.