Endometrial Receptivity Analysis (ERA)

The ERA test helps avoid implantation failure by establishing the best day for embryo transfer

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Endometrial receptivity is essential for successful implantation


What is 
the endometrium?


What is 
endometrial receptivity?


What is 
the window of implantation?


What is 
a displaced window of implantation?

Advanced Reproductive Genetic Services


  • Using a small sample of endometrial tissue the ERA test establishes the best day for transferring the embryo.
  • The biopsy sample is easily and quickly taken by your gynaecologist during your appointment.
  • ERA will determine if the endometrium is receptive or not at the time of sampling, by analysing 236 genes involved in endometrial receptivity.
  • ERA testing can find your personalized WOI in case of displacement, and will allow a personalized embryo transfer (pET).

Who should use ERA?

The ERA test is recommended for:

  • Patients who have suffered recurrent implantation failure with high quality embryos.
  • 3 in every 10 patients have a displaced window of implantation.
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  • When performing the embryo transfer in a personalised way, the chances of getting pregnant are increased after the assisted reproduction treatment.
  • ERA improved global pregnancy rate, up to 85%* in the personalized transfers made according to the test results.

*SREI Prize Paper 2016. 0-115 Simón et al. on behalf of the ERA RCT Consortium.

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How ERA works


Patient stories

“Without the ERA testing, we would not have our beautiful daughter Abigail. She is the light of our lives – and we are having so much fun."

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