nmasay – Once your levels are stable, then you can usually proceed with trying to conceive. Thyroid disease that is not in control during pregnancy really increases the risk of miscarriage plus there are additional risks for the pregnant women. Happily, once your levels are stable – then preganacy can follow a pretty normal course in most cases. Pregnancy does influence thyroid levels, so expect more frequent lab monitoring when you are pregnant – and some adjustment in your meds.