be prepared for your body to be WEIRD during pregnancy re your thyroid. We went up and down on my dose 75 was too high....50 not high enough...tried 62.5 (think I had to split pills for this one)...still too high - I could tell by heart palpitations...finally nailed it with 56 (split again). It was frustrating but that dose worked the rest of my pregnancy once we finally found it.