ERA test (endometrial receptivity analysis)
Also written as ERA
A test that biopsies the womb lining to try to identify the optimal day for embryo transfer based on gene expression.
In plain English
It's a lab test on a sample of your womb lining, aiming to pinpoint the best day in your cycle to transfer an embryo.
Why it matters
The HFEA lists this as an add-on with limited evidence that it improves live birth rates for most patients, so it's generally considered after repeated unexplained implantation failure rather than routinely.
Related terms
Guides that cover this
Sources
- Treatment add-ons with limited evidence, HFEA. Link checked 17 September 2026.
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