Adequate posture and the lessons learned in your prenatal classes concerning body mechanisms are the best ways to avoid back pain. As for calf cramps, you may have to review your calcium intake. When a cramp occurs, pull your foot up to stretch the muscle. You can also apply warmth.

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If you feel dizzy when you are lying on your back, it is probably because your uterus compresses your vena cava and disrupts the blood flow that returns to the heart. Lie on your left side and the vena cava on the right will be released. Your blood circulation will be much better.

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• Common discomforts during pregnancy