Get To Know About the Thyroid Function Test Normal Values in Pregnancy

Get To Know About the Thyroid Function Test Normal Values in Pregnancy

November 5, 2019 0 By admin

Pregnancy is the period when several hormonal changes take place in the body. There are several metabolic needs during pregnancy that needs to be fulfilled through various processes. In order to know about the thyroid function test normal values in pregnancy, you can go through this article. 

Maternal and fetal thyroid figures vary during gestation period. Because of The different physiological changes occurring at the time of pregnancy, there is specific need for analysis of thyroid functions test at an interval of specific- trimester. Dr. Ozus has discussed about the different thyroid test and normal values in pregnancy, which are provided in this article elaborately. 

The level of thyroid stimulating hormone, thyrotropin reduces during pregnancy due to the effect of placental human chronic gonadotropin. Apart from this, pregnancy is a anxiety test for thyroid, which results in the occurrence of hypothyroidism in a women with inadequate thyroid or lack of iodine. The improper functioning of thyroid particularly hypothyroidism can have harmful effect on pregnancy. 

The main thyroid diseases occurring at the time of pregnancy are Hyperthyroidism and Hypothyroidism. These are relatively common at the time of pregnancy which needs proper treatments. 

Suggestions for examining Thyroid Disease at the time of pregnancy

Here are a few recommendations for TSH levels at the time of pregnancy:

  • First trimester: not as much of 2.6 with a range of 0.1-2.6
  • Second trimester: 0.2-3.1
  • Third trimester: 0.3-3.1

If the TSH is more than 2.6 at any point of pregnancy, T4 levels are required to be examined to ascertain if the hypothyroidism is more or subclinical. 

In case the level of T4 is low, the diagnosis is assumed to be overt hypothyroidism that might weaken an infant’s neurocognitive development. Besides that, there are possibilities of miscarriage, premature birth and low birth weights. Therefore, it is necessary to do proper treatment of overt hypothyroidism. 

In case the level of TSH is high and the level of T4 is normal, then the diagnosis is expected to be subclinical hypothyroidism. In this respect, the next thing whish you must follow is the checking of antithyroid peroxidise antibodies and if the analysis appear to be antibody positive then there is need of proper treatment. The effect of subclinical hypothyroidism on fetal neurocognitive growth is ambiguous. However, some studies in this regard have shown that if this is not treated properly then the child may have low IQ levels.

Also Read : What Kind of Problem Will You Suffer After Menopause?

According to Dr Ozuz, treatment of pregnant women becomes necessary when the level of TSH is 10 or above 10. Here the Level of T4 is not of much concern. Besides that, TSH must be examined at an interval of four weeks at the period of twenty weeks of gestation. This test must be again monitored at the period of twenty-six and thirty-two weeks.

These are the primary factors which increase the risk of thyroid problems in a woman.

  • When age is more than 30
  • Residing in a area where there is insufficiency of iodine
  • If the ancestors had thyroid problems
  • BMI of 40 or above
  • Certain medicines, like lithium or amiodarone

Here are the various Symptoms of thyroid in females during pregnancy:

Symptoms of Hyperthyroidism:

  • Severe nausea or vomiting
  • Irregular heartbeat
  • Slight tremor
  • Nervousness
  • Loss of weight which is a negative sign during pregnancy

Symptoms of Hypothyroidism:

  • Extreme exhaustion and fatigue
  • Too much weight gain
  • Difficulty in concentrating and memory problems
  • Constipation
  • Sensitivity to cold temperatures
  • Muscle cramps


the above guidelines give a comprehensive detail account of hypothyroidism, thyroid nodules, postpartum thyroiditis, subclinical thyroidism occurring at the time pregnancy. Dr. Ozuz has also provided a useful tip for assessing postpartum depression: contemplate the thyroid and examine the T4, TSH, thyroid antibodies.