At times, you may feel a fluttering or pounding sensation in your chest, especially when standing up from a lying or sitting position. This odd feeling results from changes in your blood pressure as your circulation system quickly expands during the second trimester. It's usually not a sign of problems, but you should tell your doctor about it, particularly if you're also feeling short of breath or having chest pains.
Take it easy when you're getting out of bed or rising from a chair. Breathe deeply and stay still until you feel your heartbeat settling down again.
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