Do Anti-Thyroid Meds Affect Pregnancy?

Hello 

Thank you for reaching out to Dr. Galen. Please find the below response to your query.

Possibility:

 1. Normal methimazole use won't hinder pregnancy.

 2. Maternal exposure to methimazole in the first trimester can lead to teratogenic effects in the infant.

 3. Birth defects may include choanal atresia, congenital heart disease, and facial dysmorphism.

Recommendations:

 1. Propylthiouracil is often preferred during pregnancy.

 2. Superiority of propylthiouracil over methimazole isn't confirmed in comparative studies.

Seek Medical Advice:

 1. It's crucial to consult a healthcare professional for personalized guidance and monitoring during pregnancy.

Thanks