Q: Can I continue doing abdominal exercises until the baby is born?
A: The main concern about abdominal exercise is that lying on your back can cause the increased weight of your uterus to compress the vena cava, the large vein that runs along your spine and carries blood to the heart. But as long as you exercise on your back for short periods--five minutes at a time--and stop if you experience dizziness, shortness of breath or pain, you should be fine. If you do develop these symptoms, prop up your back and shoulders with pillows. For an excellent DVD/video series featuring prenatal abdominal exercises, visit www.maternalfitness.com.