I have hashimoto's thyroiditis and want to have a baby. what are the chances my baby will be born with a thyroid disorder?

Unlikely if treated: Among the most common complications arising from overt hypothyroidism during pregnancy are preeclampsia/hypertension, placental rupture, preterm delivery with low birth weight, postpartum hemorrhage, and physical/neurological/psychological problems for the child. Babies born to women with "untreated hypothyroidism" due to hashimoto’s disease may have a higher risk of birth defects.

Very low: Hashimoto's thyroiditis is the most common cause for low thyroid in the us. Although your baby would be at a higher risk for developing autoimmune thyroid disease at some time in his/her life, it is very unlikely that there would be a problem at birth. You need to make sure that your thyroid levels are normal throughout pregnancy to optimize the growth and development of your baby.