From Mary Shomon,
Your Guide to Thyroid Disease.
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Hyperthyroidism - or having an overactive thyroid gland - can pose special concerns during pregnancy. When the body delivers too much thyroid hormone, both the mother and the baby can suffer. Miscarriages, premature births, and intrauterine growth retardation can occur when the disorder goes undiagnosed or untreated. Pregnant women with hyperthyroidism can also develop high blood pressure, and are at greater risk of heart conditions.

You'll have to be your own best advocate during pregnancy when you have an overactive thyroid -- beginning with finding a physician who will work with you to treat your condition within safe limits for the health of your baby.

Visit an in-depth online FAQ for detailed answers to the following frequently asked questions related to pregnancy and hyperthyroidism:

• How do I tell the difference between normal symptoms and mood swings of pregnancy and an out of control thyroid?
• Will I have to change my treatments for existing thyroid conditions, such as Graves disease when I become pregnant?
• What if my doctor believes I require surgery for my hyperthyroid condition while I am pregnant?
• If I continue with medication while pregnant or breastfeeding, will either I or my baby experience problems because of it?