Normal values ​​of three thyroid function tests in pregnant women

The three thyroid function tests for pregnant women are the levels of thyroid hormone, thyroxine and thyroid-stimulating hormone. These three items are different in each stage of pregnancy. The levels will automatically increase with the duration of pregnancy. Moreover, the three thyroid function tests for pregnant women can prevent pregnant women from developing symptoms of diabetes and gestational hypertension, so it is necessary to conduct the three thyroid function tests in the second trimester.

What is normal thyroid function during pregnancy

Normal values ​​of five thyroid function tests:

①T4 serum thyroxine: 65~155nmol/L (5.0~12.0μg/dL).

②FT4 serum free thyroxine: 10.3~31.0pmol/L (0.8~2.3ng/dL).

③T3 serum triiodothyronine: 1.8~2.9nmol/L (115~190ng/dL).

④FT3 serum free triiodothyronine: 2.0~6.6pmol/L. ⑤TSH serum thyrotropin: 0.3~5.0mU/L. Generally, thyroid function does not have a big impact on pregnancy. As long as there are no complications, it will not affect normal fertility.

What are the normal values ​​of the three thyroid function tests for pregnant women?

What is the normal range of thyroid hormone values ​​during pregnancy? TSH should be controlled at 0.1-2.5mIU/L in the early pregnancy, 0.2-3.0mIU/L in the mid-pregnancy, and 0.3-3.0mIU/L in the late pregnancy. Suggestions: The normal value of thyroid hormone during pregnancy is different from the reference value during the non-pregnancy period. Generally, five thyroid function tests will be conducted when the file is created in the early pregnancy. Those with abnormalities are recommended to take medication under the guidance of an endocrinologist.

Thyroid values ​​below normal range

Antithyroid drug treatment, adjuvant therapy and nutritional lifestyle treatment, etc., use thiourea drugs to inhibit the organicization of iodine in the thyroid gland and reduce the synthesis of thyroid hormones. However, this type of drug does not inhibit the thyroid gland's iodine uptake and the release of synthesized hormones. In this case, beta-blockers should be added in the early stages of treatment. Suggestions: It is recommended to review TT3, TT4, FT3, FT4, sTSH, and TSH. T3 and T4 should be controlled in the upper-middle normal range.

When is the most accurate time to check thyroid function during pregnancy?

When should I check my thyroid function during pregnancy?

Generally, it is best to test thyroid function once before pregnancy. If there is no abnormality, there is generally no need to check again during pregnancy. If you have not done a thyroid function test before pregnancy, it is still necessary to do it once after pregnancy. There is no rule of “can or cannot” for the examination; you can do it as long as you want.

How to check thyroid function

Usually when preparing for pregnancy, you need to check your thyroid function by taking a blood test in the morning on an empty stomach without eating. Even if you are pregnant, you can still check your thyroid function without food or water for more than 8 hours. It is mainly used to prevent abnormal thyroid function from affecting the development of the fetus. If hypothyroidism can lead to intellectual maldevelopment of the fetus, hyperthyroidism can easily lead to miscarriage, so it is better for everyone to get checked. If any abnormality is found, timely measures should be taken and cooperate with the doctor for treatment.