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What would be the health risks, if any, to a fetus if a pregnant woman has hyperthyroidism?

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Dr. Piers Blackett
Pediatrics - Endocrinology

In brief: Significant

Graves disease is the most common form of hyperthyroidism in pregnancy.
Since it is autoimmune, antibodies to the TSH receptor can pass from the mother to the fetus triggering severe hyperthyroidism in the baby in some cases. Testing for the antibodies in the baby at birth can predict hyperthyroidism which can be delayed by a week or so.

In brief: Significant

Graves disease is the most common form of hyperthyroidism in pregnancy.
Since it is autoimmune, antibodies to the TSH receptor can pass from the mother to the fetus triggering severe hyperthyroidism in the baby in some cases. Testing for the antibodies in the baby at birth can predict hyperthyroidism which can be delayed by a week or so.
Dr. Piers Blackett
Dr. Piers Blackett
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