Unfortunately there isn't anything you can do to stop them. It is possible the pressure from the baby pushing on the heart or vagus nerve is triggering them. I would say try to cough if you feel a run of them and see if you can break them up. Also, avoid foods that irritate the stomach. Avoid caffeine, sugars, carbohydrates and spicy foods. Work on reducing stress and anxiety and try to breath deep and steady and see if that helps reduce them. Drink lots of water as it will help the heart to function better. Hopefully once you have the baby all the symptoms will subside but try to not worry. They really are harmless in an otherwise healthy heart but do inform your doctor so they know. Take care and best of luck with the baby.
Unfortunately there isn't much you can do to avoid them. It is possible the pressure the baby is pushing on the heart or vagus nerve is triggering them and they will stop after you have had the baby but if you notice little runs try and cough to see if it will break them up. Drink lots of water and try to breath deep and steady and see if that helps. Avoid foods that irritate the stomach. Avoid caffeine, sugars and carbohydrates and spicy foods. Try to work on stress and anxiety. Those are all the biggest trigger. But try to not worry. They are pretty harmless and are mostly annoying. Talk to your doctor about them just so they are aware. Take care and best of luck with the baby.