ERPeakSM Endometrial Receptivity Test

Precision Embryo Transfer

Processed on CooperGenomics’ custom-developed and validated platform,¹ the new ERPeakSM endometrial receptivity test offers accurate and reliable detection of the receptivity status of the woman’s endometrium.


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Why test for endometrial receptivity status?

The Window of Implantation (WOI) is the short time period during which the endometrium is ready to accept an embryo, i.e. is receptive, for implantation.

This is typically five days after progesterone exposure in an assisted reproduction treatment cycle.

In approximately 30% of women, though, the WOI is shifted, occurring either earlier or later than five days after progesterone exposure.²

How it works

CooperGenomics’ ERPeakSM test measures the expression of relevant hormone-regulated genes allowing us to determine when a patient’s window should occur, thereby informing the physician of the most suitable time for embryo transfer to increase the likelihood of achieving pregnancy.

Studies have shown a 51.7 – 63.2% pregnancy rate in patients with recurrent implantation failure (RIF) who have undergone endometrial receptivity testing.3,4

Four simple steps

Download Our ERPeak Endometrial Receptivity Test White Paper


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Easy result interpretation

ERPeakSM test results are reported as not-receptive, pre-receptive, receptive,
post-receptive or no result. CooperGenomics will also recommend a time for transfer in cases with pre- or post-receptive results.

ERPeakSM test options

ERPeakSM test on its own

Endometrial receptivity status
Recommended time for transfer*

ERPeakSM test + PGT (optional)

Endometrial receptivity status
Recommended time for transfer*
Euploid embryo selection

*For pre- and post-receptive test results only

  1. CooperGenomics, internal data on file
  2. Katzorke N, et al. Geburtshilfe Frauenheilkd. 2016; 76: 699–703
  3. Ruiz-Alonso M, et al. Fertil Steril. 2013;100:818–824
  4. Tan J et al., J Assist Reprod Genet 2018