Question
What is the normal range of TSH levels in newborns?
Answer
The normal range of thyroid-stimulating hormone (TSH) levels in newborns may vary due to factors such as birth time and weight. Generally, newborns have higher TSH concentrations shortly after birth because the fetus does not produce enough thyroid hormone in the mother’s womb. Typically, the TSH levels will gradually decrease within a few days after birth and reach adult levels within one to two weeks. If you are concerned about your newborn’s TSH levels, it is advisable to consult a doctor for relevant tests. Additionally, certain genetic disorders and chromosomal abnormalities may also cause abnormal TSH levels in newborns. If there is any suspicion, it is recommended to undergo early screening.