I've heard that my symptoms of rheumatoid arthritis will improve during pregnancy. My doctor told me there might be less joint pain and less swelling. Can you explain this?

About two-thirds of women with rheumatoid arthritis have fewer symptoms during pregnancy. This improvement starts as soon as the pregnancy begins and lasts until six weeks after the birth. No one knows the exact cause for these changes in arthritic joints during pregnancy. Most likely, there is an increase in the body's natural cortisone, a hormone that combats inflammation (swelling, redness, and heat in the joints).

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