Graves’ disease may present initially during the first trimester or
may be exacerbated during this time in a woman known to have
the disorder. In addition to the classic symptoms associated with
hyperthyroidism, inadequately treated maternal hyperthyroidism
can result in early labor and a serious complication known as
pre-eclampsia. Additionally, women with active Graves’ disease
during pregnancy are at higher risk of developing very severe hyperthyroidism
known as thyroid storm. Graves’ disease often improves
during the third trimester of pregnancy and may worsen
during the post partum period.