Autoimmune Disease in Women

Fact Sheets

Published 6/25/24

Autoimmune diseases occur when the body’s immune system mistakenly attacks its own healthy cells thinking they are germs or foreign bodies. Sex hormones, such as estrogen, progesterone, and testosterone, play unique roles in the body that contribute to differences between women and men concerning autoimmune diseases.

Autoimmune diseases affect more than 24 million Americans, and four out of five patients are women.

Learn more about the autoimmune disease throughout the body in the Autoimmune Disease in Women Fact Sheet.

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