Insist on getting the exact number, and the normal range for your lab. If your doctor does not believe that the lower TSH level might be optimal, you can print out a copy of a recent British Medical Journal article that indicates that the way the normal ranges have been devised may in fact mean that people with a TSH level over 2 actually represent a population that is likelier to already have developing thyroid problems. Women who miscarried also had high levels of TSH and gamma globulins at baseline, compared with those who did not miscarry. Second, insist on having thyroid antibodies tested when you have your TSH test. There's a value in having antibodies tested or looking at antibody values in someone experiencing infertility or suffering recurrent miscarriage, and particularly if TSH levels have already been checked, and are mid or high-normal.
Antibodies usually indicate a thyroid that is in the process of autoimmune failure.
Not failed yet, and often not enough to register in thyroid tests, but in the process of failing. This may be enough to affect fertility or ability to maintain a pregnancy. There are endocrinologists who believe that the presence of thyroid antibodies alone is enough to warrant treatment with small amounts of thyroid hormone. You may with to consult with an endo that has this philosophy. Dr. Vliet says that symptoms, along with elevated thyroid antibodies and normal TSH, may be a reason for treatment with thyroid hormone.