In a normal pregnancy, the levels of thyroid hormone (T3 and T4) increase due to the increase in the hormone estrogen.

Due to changes in T4 and TSH levels in pregnancy, normal ranges

specified for each trimester of pregnancy (every 3 months),” says Dr A Sharda, Consultant, Endocrinologist 

 Diabetologist, Manipal Hospital Millers Road. Therefore, it is crucial to use trimester-specific ranges for total 

 when diagnosing hypothyroidism during pregnancy, to account for the normal hormonal 

If the diagnosis is based on specific quarterly ranges, diagnosing the conditions is no longer a challenge.

The diagnosis of hypothyroidism is based on the measurement of the levels of thyroid hormones

 pregnancy is considered normal. But, a TSH greater than 10 mIU/L with a low or norma

If the TSH level is between 2.5 and 10, it is called subclinical hypothyroidism. “Subclinical hypothyroidism 

Due to changes in T4 and TSH levels in pregnancy, normal ranges