What is the causes of low TSH during pregnancy?
Q: During a blood test last week for confirming pregnancy, the report said that my wife's TSH level is 0.02 which much lower than normal of 0.24. Her other readings for Free T4 and Total T4 are normal and within range. What are the reasons for this and what precautions does she need?
A:This condition is known as subclinical hyperthyroidsm but can occur in early pregnancy in women having excessive vomiting due to hCG hormone from placenta. If your wife is pregnant observation is good enough and repeat tests should be done after 4-6 weeks time. Hyperthyroidism is condition in which there is excessive thyroid hormone production in the body. Contact me again in case you have more queries.