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Infertility

What’s the optimal endometrium thickness for FET?

9 replies

blahblahetc · 21/03/2024 20:14

Mine measured 9mm, reading mix messages from
Google.. is it quite “bespoke” and if so, based on what? Thanks!

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Olivie12 · 24/03/2024 00:33

I believe 9 mm or above is ideal. On my last FET dr waited I was 8 or 9 mm then 5 days after planned the FET so it was already a bit thicker by transfer time

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GB844 · 24/03/2024 12:18

I’m not sure there is a cut off really, the literature would suggest that anything <7mm is not ideal, but my clinic are happy with anything over 6mm on day of progesterone start or trigger (for frozen). It’s important that it has a trilaminar appearance more than anything - it will continue to thicken with the progesterone. I would be very happy with 9mm. Mine was 8.6mm on day of transfer and I have just got a BFP. Good luck 🤞

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blahblahetc · 24/03/2024 12:34

Thanks and congrats! @GB844

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Sunflower360 · 24/03/2024 14:40

I wondered about this but was reassured anything over 7mm was fine. Also found this table in a research paper that was interesting:

What’s the optimal endometrium thickness for FET?
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Sunflower360 · 24/03/2024 14:42

www.ncbi.nlm.nih.gov/pmc/articles/PMC5794374/

This was the research paper

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Lozzy000 · 24/03/2024 17:45

9mm is good. When I had my FET they wanted my lining to be more than 8mm to book the FET. I was just under so they made me wait a few days. Lining at the next scan was 10mm so they arranged the FET x

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Granolabowl · 27/03/2024 11:27

Mine was a poor 6.1mm, the cut off was 6mm but against the odds it worked

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blahblahetc · 27/03/2024 16:29

Congrats! @Granolabowl

Your message reminds me of the saying 'Nature finds a way' if it's meant to be...

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blacksnow · 31/03/2024 20:37

According to the Dr Szlarb it should be min. be 7 millimetres (source: Perfect lining for embryo transfer )

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