Abstract
THYROID disease is much more common in women than in men, and hyperthyroidism occurring during pregnancy is not rare; its prevalence is about 0.2 per cent. Thyrotoxicosis results in a significant increase in the prevalence of low birth weight and a trend toward increased neonatal mortality.1 Graves' disease is the major cause of thyrotoxicosis in women of childbearing age, although other causes are possible, including trophoblastic tumors and hydatidiform mole.2 Patients with the thyrotoxicosis of Graves' disease tend to have remission during pregnancy and exacerbation during the postpartum period.3 An explanation for fluctuations in the intensity of Graves' disease during . . .