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Miscarraiges & TSH of 2.9 what does this mean?

4 replies

Wheretoholiday71 · 29/11/2025 07:49

Hello I have had 2 miscarraiges back to back, one chemical at almost 6 weeks and one D&C for a 8/9 week loss, had seen heartbeat at early scan etc. I have no living children (it kills me to say that) I did not cope very well with the losses and I am really very heartbroken even now a couple of months on I cry most days. We are not TTC atm.

I had bloods done with my GP before the pregnancies (just regular bloods to make sure b12 etc was ok) and got a text to say "everything is normal"
then after the miscarraiges I asked for a copy of those blood results and I see my TSH is 2.9, I have often seen on here that it should be 2.5 or lower
What does this mean for me? Could this have caused the miscarraiges? Im just with my GP so she has said that anything under 4 is ok from her parameters but shes not a fertility doctor so im not sure xx

OP posts:
CatchHimDerry · 29/11/2025 12:00

Sorry to hear of your losses.

I had a perfect first pregnancy followed by around 9 losses, some back to back some after a few months gap whilst testing was completed. All early ones, never past 6 weeks.

I had every test they offered and no cause was found, which I’m told is the case around 50% of the time.
Fertility is a complex area that’s still not well understood

To give a bit of hope I am currently 37+3 after this, and praying we make it safely to delivery at 39 weeks.

I’m of the opinion these things can be a “numbers game” for want of a better phrase, needs to be the right one at the right time

I hope you will be successful OP, best wishes through the hard times x

Lillygolightly · 29/11/2025 12:17

TSH - is your Thyroid Stimulating Hormone. A reading of 2.9 (without being pregnant) wouldn’t be cause for concern, and the NHS don’t typically medicate for readings under 5. I wasn’t medicated until my TSH reached 7.9. The ideal TSH range is generally considered as between 1 and 2.5.

The thyroid is responsible for a lot of functions within the body, metabolism, vitamin absorption, hormones etc and if thyroid function is in question it should be monitored very closely during pregnancy and to make sure to keep your TSH in the ideal range.

With the information you’ve given I can’t answer with any certainty (and I’m not sure if a medical professional even could) as to whether your TSH number can be attributed to your losses. THS naturally fluctuates throughout the day and so you can get multiple various readings and 2.9 is not far from the ideal range so I do think it would be unlikely, but as I said can’t be certain as it does fluctuate.

What you can do is speak to your GP and request a full thyroid panel, you can also request for this to be monitored during pregnancy however, they typically only monitor this for pregnant patients with a diagnosed thyroid condition.

I am very sorry for your losses, I know how heartbreaking it is and not having answers can be really hard too. I also lost a little boy before I was diagnosed with my thyroid condition and I do always wonder if perhaps that was one of the reasons I lost him as it took a long time and lots of testing before finally being diagnosed.

Wheretoholiday71 · 30/11/2025 08:33

CatchHimDerry · 29/11/2025 12:00

Sorry to hear of your losses.

I had a perfect first pregnancy followed by around 9 losses, some back to back some after a few months gap whilst testing was completed. All early ones, never past 6 weeks.

I had every test they offered and no cause was found, which I’m told is the case around 50% of the time.
Fertility is a complex area that’s still not well understood

To give a bit of hope I am currently 37+3 after this, and praying we make it safely to delivery at 39 weeks.

I’m of the opinion these things can be a “numbers game” for want of a better phrase, needs to be the right one at the right time

I hope you will be successful OP, best wishes through the hard times x

I am so terribly sorry to hear of your losses. And thank you so much for sharing your story.
I probably do need to change my mindset as I am always finding a way to blame myself even though I know I did do everything by the book.
Congratulations on your current pregnancy, that is fantastic news, you are nearly there now 🥰 x

OP posts:
Wheretoholiday71 · 30/11/2025 08:36

Lillygolightly · 29/11/2025 12:17

TSH - is your Thyroid Stimulating Hormone. A reading of 2.9 (without being pregnant) wouldn’t be cause for concern, and the NHS don’t typically medicate for readings under 5. I wasn’t medicated until my TSH reached 7.9. The ideal TSH range is generally considered as between 1 and 2.5.

The thyroid is responsible for a lot of functions within the body, metabolism, vitamin absorption, hormones etc and if thyroid function is in question it should be monitored very closely during pregnancy and to make sure to keep your TSH in the ideal range.

With the information you’ve given I can’t answer with any certainty (and I’m not sure if a medical professional even could) as to whether your TSH number can be attributed to your losses. THS naturally fluctuates throughout the day and so you can get multiple various readings and 2.9 is not far from the ideal range so I do think it would be unlikely, but as I said can’t be certain as it does fluctuate.

What you can do is speak to your GP and request a full thyroid panel, you can also request for this to be monitored during pregnancy however, they typically only monitor this for pregnant patients with a diagnosed thyroid condition.

I am very sorry for your losses, I know how heartbreaking it is and not having answers can be really hard too. I also lost a little boy before I was diagnosed with my thyroid condition and I do always wonder if perhaps that was one of the reasons I lost him as it took a long time and lots of testing before finally being diagnosed.

Thank you so much for the explanation, when I tried to talk to my GP she just stated anything under 4 is normal for her, and couldnt really answer any questions I had (which is totally understandable as she is not a fertility expert) I know I am too focused on trying to find a way to blame myself, or trying to find a reason so it "won't happen next time" just to take the fear of it away.
I am so terribly sorry for your loss xx

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