TSH keeps dropping in pregnancy, will it increase back?

[gentl4u]

I am in Canada and I redid my blood test yesterday. My tsh level was 0.75 which is normal when I was in wk4+5, now I am in wk7+5, the result dropped to 0.3.....The normal range is 0.3-4.0 mIU/L.

The doctor did not tested my T3 or T4, and I am worried that might affect my baby because the number keeps dropping.....cannot image how low the number would be in wk 12....

 

[josephbaldwin]

@gentl4u Yes it’s normal for it to drop in the first trimester then it goes back up

 

[judenshabbot]

@gentl4u Why was it repeated? Both of these are normal values and not any concern, even if it’s slightly below range it’s usually just a transient hyperthyroidism related to bHCG levels and nothing is done but keeping an eye on it, but doing it twice in a short span is not common, was there a clinical reason to repeat it?