Which disease process improves during pregnancy?

d.   Rheumatoid arthritis

Approximately 70 percent of women with RA experience an improvement in symptoms beginning in the second trimester and lasting through about the first six weeks after delivery, says J. Bruce Smith, MD, assistant compliance officer for research at Thomas Jefferson University in Philadelphia and a rheumatologist whose research has focused largely on autoimmune disease and pregnancy. Fatigue may improve as well.

There are a number of theories why disease symptoms improve, including increased levels of anti-inflammatory cytokines and hormonal changes that occur during pregnancy. Researchers are continuing to study the phenomenon.

This chapter was really confusing, thank you,