Autoimmune disease in pregnancy: systemic lupus erythematosus and antiphospholipid syndrome.

Autoimmune diseases most commonly occur in women of childbearing age. Although some conditions such as ankylosing spondylitis are more common in men, over 70% of individuals with autoimmune diseases are women. This article focuses on SLE,which is often considered to be the "classic" autoimmune disease,and antiphospholipid syndrome (APS), which is associated with pregnancy loss and placental insufficiency.