Thyroid results

[9422x]

Hello,
We've just gone through our second miscarriage in 4 months. The first was diagnosed as a pregnancy of unknown location at 7 weeks which passed naturally. With the second, a scan at 7 weeks showed an empty gestational sac that was only measuring 4mm.

After the first loss, I had my thyroid tested due to family thyroid issues. The result was TSH 2.

I've just had my thyroid retested and the results were TSH 2.3 and free T4 12 pmol/l. I'm also being tested for blood clotting issues.

The thyroid results say they're in range on my NHS app but I was wondering if anyone could offer any further insight please? Are they normal to sustain a pregnancy?

Thank you in advance x

I'm so sorry for your losses
Your TSH needs to be 2.5 or below at the beginning and can rise to 3.5 from I think the second trimester.

@ofwarren thank you, it's a situation we didn't think we'd find ourselves in but sadly it seems to be such a common occurrence for women.
I'm hoping that with both tests being under 2.5 (after I'd had a negative test after the miscarriage) that the TSH isn't an issue. Not as sure about the free T4 as that seems to be on the lower end based on what Dr Google tells me...

I'm not sure about the free T4 either
I had a miscarriage 2 years ago caused by thyroid. I had no idea that I needed to take a higher dose of thyroxine and my doctor didn't tell me, even though I told them I was pregnant straight away due to a different medical issue I had.

I think your T4 is low. I know I needed to increase my thyroxine in pregnancy (GPs never suggested it, I read about it on miscarriage forums) but I don't know how it works if you weren't diagnosed with an under active thyroid first. You'd think after two miscarriages it wouldn't do any harm to try you on some medication.

@Januarysux

@ofwarren so sorry for your loss x

@Januarysux that's what I thought, I'm not on any medication and the first test I had done, the GP seemed to be puzzled why I wanted it testing after a miscarriage. I think I'll contact the GP to see if it's worth trying any medication - I'm desperately wanting to do anything that could prevent a third miscarriage

I take 150mg a day of thyroxine and I was taking 300mg during the first 2 trimesters and 350mg in the third. I came down to 200mg immediately after birth.

@rhowton do you mind me asking what your TSH and T4 levels were?

NICE have clinical guidelines on what the levels should be during pregnancy - i can’t find them now but hopefully you can or someone else might post a link. If your gp isn’t well informed (and mine wasn’t) it’ll help you make your case to get your thyroxine dosage changed.
I had three miscarriages before my underactive thyroid was diagnosed, and then when I got pregnant a fourth time I had to go in and wave the guidelines before they’d change the dosage.
That was six years ago and I now have a thriving 5 year old, so I really hope things work out for you too op.

@HeartshapedFox thank you, I'll see if I can find the NICE guidelines to have a look at