Being pregnant can be a stress test for the thyroid. The size of the gland increases by 10%. Production of thyroid hormones T3 and T4 increases by about 50%. As a result, the normal thyroid-stimulating hormone (TSH) level during pregnancy is lower than the normal nonpregnancy level.irst trimester: less than 2.5 with a range of 0.1-2.5. Second trimester: 0.2-3.0. Third trimester: 0.3-3.0. If the TSH is greater than 2.5 at any time during pregnancy, T4 levels should be checked to determine whether the hypothyroidism is overt or subclinical.
http://www.medscape.com/viewarticle/752878
TSH Range. The function of thyroid stimulating hormone (or TSH) is to regulate the normal levels of thyroid hormones in the body. It is a peptide hormone secreted by the thyrotrope cells of anterior pituitary gland. The TSH activates the thyroid gland to produce both Triiodothyronine(T3) and thyroxine (T4) hormones.ormal Levels in children. 1  The range of normal TSH levels for full term newborns is higher, as it can range from between 1.3 and 16 micro units per ML of blood. 2  The TSH range gradually reduces to 0.9 to 7.7 micro units per milliliter after 30 days.
http://hyperthyroidismsymptomsx.com/tsh-range
First Trimester TSH levels between 2.5 and 5.0 are associated with increased pregnancy loss. ABBREVIATIONS & DEFINITIONS. Thyroxine (T4) — the major hormone secreted by the thyroid gland. Thyroxine is broken down to produce Triiodothyronine which causes most of the effects of the thyroid hormones.irst Trimester TSH levels between 2.5 and 5.0 are associated with increased pregnancy loss. ABBREVIATIONS & DEFINITIONS. Thyroxine (T4) — the major hormone secreted by the thyroid gland. Thyroxine is broken down to produce Triiodothyronine which causes most of the effects of the thyroid hormones.
http://www.thyroid.org/patient-thyroid-information/ct-for-patients/vol-3-issue-8/vol-3-issue-8-p-5-6/
First trimester: less than 2.5 with a range of 0.1-2.5. Second trimester: 0.2-3.0. Third trimester: 0.3-3.0. If the TSH is greater than 2.5 at any time during pregnancy, T4 levels should be checked to determine whether the hypothyroidism is overt or subclinical.irst trimester: less than 2.5 with a range of 0.1-2.5. Second trimester: 0.2-3.0. Third trimester: 0.3-3.0. If the TSH is greater than 2.5 at any time during pregnancy, T4 levels should be checked to determine whether the hypothyroidism is overt or subclinical.
http://www.medscape.com/viewarticle/752878
Results. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. The normal values listed here-called a reference range-are just a guide.These ranges vary from lab to lab, and your lab may have a different range for what's normal. thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. The normal values listed here-called a reference range-are just a guide.
http://www.webmd.com/women/thyroid-stimulating-hormone-tsh?page=2
This leads to high levels of TSH and low levels of free T4. If your free T4 levels are too low—the normal range for T4 is 5 to 13.5 micrograms per deciliter—it's a possible indicator that you have hypothyroidism, even if your previous TSH tests came back normal.Again, the normal ranges vary from lab to lab. Anti-thyroid Microsomal Antibodies Testing.our doctor will measure your TSH levels with a blood test. TSH levels are determined by ranges (all figures in mU/L—milliunits per liter). Below are the ranges, according to the American Thyroid Association. However, these numbers are not set in stone.
http://www.endocrineweb.com/conditions/hypothyroidism/hypothyroidism-diagnosis
* References ranges recommended by the American Thyroid Association if trimester-specific reference ranges for TSH are not available in the laboratory. References ranges recommended by the American Thyroid Association if trimester-specific reference ranges for TSH are not available in the laboratory.
http://www.perinatology.com/Reference/Reference%20Ranges/TSH.htm
1 The range of normal TSH levels for full term newborns is higher, as it can range from between 1.3 and 16 micro units per ML of blood. 2  The TSH range gradually reduces to 0.9 to 7.7 micro units per milliliter after 30 days.3  The TSH narrows to 0.6 to 5.5 micro units per milliliter in school going children.ormal Levels in children. 1  The range of normal TSH levels for full term newborns is higher, as it can range from between 1.3 and 16 micro units per ML of blood. 2  The TSH range gradually reduces to 0.9 to 7.7 micro units per milliliter after 30 days.
http://hyperthyroidismsymptomsx.com/tsh-range
Hypo-and hyperthyroidism are both associated with increased pregnancy loss. In addition, it has been shown that women with normal thyroid-stimulating hormone (TSH) levels, but with evidence for thyroid autoimmunity, are at approximately a 2-fold increased risk for pregnancy loss.n addition, it has been shown that women with normal thyroid-stimulating hormone (TSH) levels, but with evidence for thyroid autoimmunity, are at approximately a 2-fold increased risk for pregnancy loss.
http://www.medscape.com/viewarticle/732415
During pregnancy, a 30%-40% increased need for thyroid hormones is the result of increased placental uptake, higher thyroid-binding globulin levels, and greater blood volume.n addition, it has been shown that women with normal thyroid-stimulating hormone (TSH) levels, but with evidence for thyroid autoimmunity, are at approximately a 2-fold increased risk for pregnancy loss.
http://www.medscape.com/viewarticle/732415
tsh level ranges for pregnancy
The thyroid stimulating hormone level ranges for pregnancy are, the first trimester is less than 2.5 with a range of 0.1 to 2.5, the Second trimester is  0.2 to 3.0, the Third trimester is  0.3 to 3.0. TSH levels during pregnancy are the following first trimester is less than 2.5 with a range of 0.1-2.5  and Second trimester is 0.2-3.0 and Third trimester is 0.3-3.0.