I'm currently 18 weeks pregnant and very worried.
Before pregnancy I had my thyroid checked and got the following labs:
TSH 2.38 (.34 - 5.60)
FT3 3.13 (1.71 - 3.71)
FT4 .70 (0.61 - 1.12)
My endo said everything was fine, I wasn't hypo, even though I told her I was planning to get pregnant and felt that my TSH was too high for pregnancy. The only symptom I had were irregular periods and she put me on Duphaston in order to regulate this.
But decided to ask for a second opinion. The new endo understood my concerns and agreed to put me on a small dose of levothyroxin (Euthyrox 25) and so one month after starting treatment I got pregnant..
I decided to get tested every 4 weeks during pregnancy and so far I got labs as follows:
At 4 weeks of pregnancy:
TSH 1.22 (.34 - 5.60)
FT3 2.52 (1.71 - 3.71)
FT4 .88 (0.61 - 1.12)
Endo felt they were ok.
At 8 weeks of pregnancy:
TSH .86 (.34 - 5.60)
FT3 2.33 (1.71 - 3.71)
FT4 .73 (0.61 - 1.12)
Endo a little concerned with my FT4 levels, but still confident everything was fine; No dose increase..
At 12 weeks of pregnancy:
TSH .85 (.34 - 5.60)
FT3 2.55 (1.71 - 3.71)
FT4 .76 (0.61 - 1.12)
Couldn't reach endo, no change in dosage
At 17 weeks of pregnancy:
TSH 1.44 (.34 - 5.60)
FT3 2.48 (1.71 - 3.71)
FT4 .60 (0.61 - 1.12)
This time around I got worried! Endo increased dosage by 50 Euthyrox , but said not to worry, baby is fine, even with these low end numbers , since my TSH was still so good and the FTs (almost) in range! She even implied that maybe the lab had made an error and suggested that next time around I should get tested at another lab.
But I'm still worried sick, especially after reading your posts and learning that a normal TSH is not relevant, but good FT4 levels are crucial.. And mine are so low!
What do you all think? Could it be a lab error, considering the fact that my FT4 has always been at the lower end, with or without meds? I know I will eventually find the answer to this question, but until then I can't stop obsessing over this issue..
Do you think it is possible that may baby was damaged by these low end FT values during the first trimester? I want to add that I'm totally asymptomatic, I feel perfectly fine and the baby is developing fine, according to my gyn?
Sorry for the extra long post, but I'm so worried..
Thanks for answering!