PLEASE HELP! Currently 7wk pregnant with low TSH

[Loveday511]

Hello I am currently 7 weeks pregnant and spoke to my RE regarding my recent TSH results.  I have been taking Levothyroxine 100mg due to hypothyroidism and the level came back at 0.059.  I am worried since the first trimester is crucial for fetus development and I know thyroid levels should remain controlled and my TSH is below what is a desired level.  My question is should I discontinue my medication and get my TSH retested?  And is it possible that we caught it early enough to keep down any issues with the baby?  Any and all info would be great!!!

[OzBron]

If the TSH was done as part of the initial obstetric bloodwork they probably didn't do T3 and T4. TSH often drops in first trimester and it is common to be hyper particularly if you have bad morning sickness. It then settles out in 2nd trimester. That is completely normal and seperate from any prior Thyroid issue.
The issue is if you have poorly controlled hypo where you may not have enough hormone for the baby and yourself which can affect neural development in the 1st trimester (thus the 'slow' comment). Being hyper is less of an issue for the baby and they usually try to run you on the hyper end of things in pregnancy. If you are very hyper for extended time the baby may not put weight on as easily later in pregnancy (as the metabolism is faster for the baby as well as for you). The biggest issue is for you with regard to the heart effects of being hyper and carrying a baby.
You will definitely need close watch but don't worry about the baby - if you are hyper the baby will get the hormones it needs to grow.
I was very hyper at the start of my pregnancy with TSH of zero for most of the 1st trimester. It calmed down as the pregnancy progressed (always hyper end) and my daughter is absolutely perfect.

[Loveday511]

I am feeling just fine....just nausea which is from the pregnancy.  I don't feel hyperthyroid symptoms.  I called my Dr. @ the fertility clinic & they are going to send my results.  I did ask if they tested both Free T3 and Free T4 in addition to the TSH and she said she just sees the results from the TSH so I am assuming they didn't.  So I am sure my Dr. will run those tests ASAP!  I believe I am overmedicated @ this point and they will reduce my meds.  I will keep you posted!  Thank you so much for your help.

[aaamommy27]

Just find a good doc to regulate you. How are you feeling? Do you feel hyperthyroid?
I think your baby will be fine, its when you are not being treated at all. See, I found out I had hashimotos after having my first son. He is totally normal though. I hope they checked my TSH back then, but who knows. I have always had signs of hypothyroid. I have know idea when the disease actually started though. Just make sure they continually check your thyroid. Usually, but not always, during pregnancy you require more thyroid medicine.
I think the last pregnancy I went up a little bit. Please just make sure you are being monitered correctly. After giving birth to my last two babies is when my thyroid really flucuated pretty bad. I think for me it is the loss of hormones, and I am extremely progesterone deficient!
See if you can get your Free T3 and Free T4 numbers, its a better calculator for seeing how you are doing.

[Loveday511]

Thank you so much for your response.  No they didn't give me the T3 & T4 levels.  I will have to check with my clinic again to see what those levels were.  I think this is happening because my dose is too high of the Levothyroxine and needs to be adjusted.  Just in June my TSH was 1.34which was great and my T3 & T4 was normal.  It has never been the T3 & T4 issue but my TSH has been the issue.  Do you think that since it is still a bit early in the pregnancy and I get it regulated quickly things will be ok?  When you say "slow" baby that really scares me!!  

[magpieannie]

I think the issue is when there is not enough available t3. I've always heard that the freet3 and freet4 need to be kept higer in range when pregnant so that there is enough thyroid hormone available to both you and your baby-thus resulting in a lower TSH. If the TSH were higher then I'd be more concerned-however your doctor should be tracking the Freet3 and freet4 as well as the TSH to get a more complete picture.

[aaamommy27]

I was pregnant twice with hypothyroid. I was told that a thyroid not treated properly could cause a "slow" child. Are you seeing an endocrinologist? You need to be monitered every 6 weeks while pregnant. You definitly do not want to stop your medication. Make sure you are being followed properly though. How are you feeling?
Do you have your Free T3 and Free T4 levels?