Dr. Westin Childs Podcast: Thyroid | Weight Loss | Hormones

TSH is a marker of thyroid function and it's incredibly important if you are pregnant. During pregnancy, the thyroid gland enlarges and must produce enough thyroid hormone for both you and your child. If you can't produce enough thyroid hormone then your child may suffer from developmental issues, a low birthweight and potentially a lower than normal IQ. Because of this, doctors recommend that thyroid function be monitored very closely during pregnancy. It also means that the standard "healthy" ranges must be altered during pregnancy to match the increase in demand of thyroid hormone. This means there are new reference ranges for the TSH and other thyroid hormones. You can find these levels below: Standard TSH levels during Pregnancy: First trimester: 0.1 to 2.5 mU/L Second trimester: 0.2 to 3.0 mU/L Third trimester: 0.2 to 3.0 mU/L Normal non-pregnant TSH range: 0.5 to 4.0 mU/L (with newer studies showing that a healthy TSH is probably less than 2.5 (2) and maybe even closer to 1.0 mU/L (3)) M