Thyroid levels prior to IVF (not doing a fresh transfer)

[Skittles11]

Hi all

Just wondered if anyone knows.

I am having my TSH monitored and my latest result is 2.9 mIU/L. I know a lot of clinics want it under 2.5 and my clinic wants it under 1.

But do they want it under 1 before I start stims or is it that they want it under 1 before I transfer any embryos to prevent possible implantation issues? Does anyone know? I thought it was the latter but I'm not 100% sure.

I'm due to start a short cycle in a matter of days however I won't be doing a fresh transfer, any embryos will be tested and then frozen. If it needs to come down only before transfer then I have time on my side. If it needs to be low before stims start this could be problematic.

I will obviously check with clinic tomorrow but does anyone have any knowledge?

Thanks for any advice x

[Hidden]

Good question. I hope someone answers

[Skittles11 in reply to Hidden]

Thanks! Maybe nobody knows. I shall speak to my clinic tomorrow anyway. X

[Hidden in reply to Skittles11]

Oh sorry. And yes please ask them. I hope everything goes well for you! Wishing you the best

[CassieJ]

Hello I hope you’re doing ok. I have read before that thyroid function is involved in follicle maturation (think T3/T4 though rather than TSH-but can’t remember exactly on the spot) and also that subclinical hypothyroidism is connected to miscarriage. I have also read that thyroid function generally is tied to egg quality. I’ve quickly googled to see if I can find any of the data I’ve read and can’t see anything robust to link here. But I mention it as I think if it was me I would want my TSH lower before stims-or at least double check with a good RE/IVF specialist endocrine first that it really won’t affect anything. So hard as results from stim rounds are affected by lots of things and ultimately chance too so you maybe fine. But Thyroid function very subtly played a role in miscarriages for me-so I would want to be sure even if I was doing a freeze all. Xx

PS not sure how helpful but this web info says a bit about some of the things I’ve mentioned

endocrineweb.com/conditions...

[Star241]

It’s a really good question, interestingly when I did become pregnant my clinic retested my TSH it had actually gone up again they recommended a higher dose of thyroxine as they did still not want it to be higher than 1.5-2, and it had gone up to 4, 4 weeks on from that my thyroid is again being retested at the GP and I’m interested to see what the gp advice would be as I think they are ok with anything up to 4!