During pregnancy, immunologic suppression occurs which induces tolerance to the presence of the fetus. Without this suppression, the fetus would be rejected causing miscarriage. As a result, following delivery, the immune system rebounds causing levels of thyroids antibodies to rise in susceptible women. Specifically, the immunohistological features of susceptible women are indicated by: *antibodies to thyroglobulin (TgAb) *antibodies to thyroid peroxidase (TPOAb) *increase in TPOAb subclasses IgG1-IgG3 *lymphocyte infiltration and follicle formation within thyroid gland (Hashimoto's thyroiditis) *T-cell changes (increased CD4:CD8 ratio) * TSH-receptor antibodies (TSH-R Abs)
Postpartum thyroiditis
Radiation-induced thyroiditis
Subacute thyroiditis
Autoimmune thyroiditis
Ord's thyroiditis
Subacute lymphocytic thyroiditis
De Quervain's thyroiditis
Riedel's thyroiditis