I read tht tsh rise in pregnancy.i'm hypothyroid n had tsh 4.57 b4 a chemical pregnancy.8 days after 4wk pregnancy miscarriage, its reduced to 0.25. y?

Lab error: Hi again, I previously tried to answer your question. Now that I can see that it was the TSH reduced to 0.25, I have to suspect lab error. There would be no reason for your TSH to fall that much during this episode. Either it was mismeasured or misreported, and should be 2.5 mIU/L. Test needs repeating. Best wishes!

Thyroid requirements: can vary significantly during pregnancy and lab must be monitored closely. TSH's are commonly low or low normal in early pregnancy. A TSH of 4.75 is too high if you are attempting conception. Check w/your doctor. Make sure you are on brand name replacement for safety and consistency.