TSH going a bit lower is suggestive but not conclusive that remission is less likely. At this point, I often check a TSI and compare to initial TSI (if tested, aka TSH-Receptor Ab) -- if still high, less chance remission. If cannot wean off tapaole (going to 2.5mg/day to see response may be worth a try), then options include using PTU (instead of tapazole) and going ahead with pregnancy OR going to I-131. Remember - only about 40% of patients achieve remission with anti-thyroid drugs. IF I-131, then wait at least 6 months before trying to conceive.