This is my 3rd pregnancy. My 1st I had no problems during pregnancy, but developed post partum thyroiditis. Resolved after 1 year. 2nd pregnancy I had a hypothyroid not discovered until 6 weeks, miscarried. Resolved immediately. Now I am pregnant again. Last week I got my TSH checked and it was 2.7. Fabulous the doctor said, not a problem, get it checked again in 2 weeks. However after doing some research I have found studies that during the first trimester the TSH should be 2.5 or less?? This particular doctor I have problems with in the past, he does not seem very educated on Thyroid problems. However due to Xmas holiday leave there were not many doctors to choose from. Does anybody have any advice on whether I need to go on Thyroxine based on a Borderline TSH? I have had another blood test this morning, obviously if it is a lot higher I will but if it is still borderline I'm not sure if I should demand treatment or not??