Three reference values ​​of thyroid in pregnant women

The thyroid gland is an essential endocrine organ in the body, and it is very necessary to go to the hospital regularly for thyroid hormone tests, because the thyroid gland is also an organ prone to disease. For example, common thyroid diseases include hyperthyroidism and thyroid cancer. Thyroid hormone tests should also be done during pregnancy. So what are the reference values ​​for the three thyroid hormones for pregnant women?

Normal values ​​of three thyroid function tests

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

FT3 serum free triiodothyronine: 2.0~6.6pmol/L.

TSH serum thyrotropin: 0.3~5.0mU/L.

Thyroid function tests are essential during pregnancy

During pregnancy, expectant mothers experience increased levels of estrogen and human chorionic gonadotropin (HCG) in their bodies, which increases thyroid hormone production, thereby inhibiting the secretion of thyroid stimulating hormone (TSH) and reducing serum TSH levels by 20% to 30%.

A decrease in TSH levels usually occurs between 8 and 14 weeks of pregnancy, with the lowest point being between 10 and 12 weeks of pregnancy. At the same time, serum free thyroxine (FT4) levels in early pregnancy are 10% to 15% higher than those in non-pregnancy. Due to the maternal immune compromise on the fetus, the titer of thyroid autoantibodies (TPOAb) gradually decreases after pregnancy and drops to the lowest titer at 20 to 30 weeks of pregnancy.

"Therefore, clinicians can judge thyroid dysfunction during pregnancy and whether treatment is needed based on changes in the three major indices: TSH, FT4, and TPOAb. Changes in these three indices have a good predictive effect on thyroid disease during pregnancy.

I believe everyone already knows the three normal values ​​of thyroid function. The TSH in thyroid function generally requires pregnant women to control it below 2.5. If it is too high, it will affect the treatment of the fetus. The doctor will recommend that you take medication to control it and conduct regular examinations to adjust the dosage of the medication.

What precautions should patients with hyperthyroidism take when preparing for pregnancy?

1. Closely monitor thyroid function before pregnancy

Eight weeks before pregnancy, women of childbearing age should go to the endocrinology department of a regular hospital to test their thyroid function and measure the level of thyroid hormone in the blood through venous blood sampling. The basic test items include TSH, FT3, FT4, A-TPO, and A-TG. Thyroid B-ultrasound can be performed if necessary.

2. Women with hyperthyroidism who are preparing for pregnancy should pay attention to their diet

The diet of women with hyperthyroidism who are preparing for pregnancy should be based on the principles of high calories, high protein, high vitamins, moderate fat and sodium salt intake, and less spicy and irritating condiments. The food should be soft, easy to digest and nutritious. Do not eat too much high-iodine food, such as kelp, seaweed, jellyfish, seaweed and algae, to prevent poor control of hyperthyroidism. No smoking, no alcohol, strong tea or coffee. Provide adequate carbohydrates and fats, and appropriately increase the intake of animal offal, fresh green leafy vegetables, or vitamin preparations.

Appropriately control the intake of foods high in fiber. Hyperthyroidism patients often suffer from diarrhea, and excessive supply of fiber-rich foods will aggravate the diarrhea.