Endometrial receptivity analysis (ERA): Purpose, procedure, and success rates

In Vitro Fertilization (IVF) has achieved remarkable success through advanced embryo selection. However, the other essential component of success is timing the transfer. For an embryo to implant, the uterine lining must be receptive. This receptivity window is highly specific.

For patients experiencing repeated failed transfers despite transferring high-quality embryos, the issue may be timing. An endometrial receptivity analysis ERA test determines your personalized window of implantation, ensuring the embryo is transferred at the exact moment your lining is most receptive.

What Is the ERA Test?

The ERA test is a diagnostic genetic test performed on a small biopsy of the uterine lining (endometrium). Research indicates that up to 30% of women have a displaced window of implantation, requiring more or less progesterone exposure before transfer. The ERA test analyzes the expression of 248 genes to determine the exact hour of receptivity.

The ERA Procedure: Step-by-Step

The test is performed during a "mock" cycle that mimics transfer preparation:

1. Lining Preparation: Taking estrogen and progesterone medications to build the uterine lining.
2. The Biopsy: A thin, flexible tube called a Pipelle is inserted through the cervix to collect a small tissue sample. The procedure takes under a minute and causes mild cramping.
3. Laboratory Analysis: The sample is sent to a genetic lab, and the embryos remain frozen for a future transfer cycle.

Optimize Your Transfer Timing
Personalizing the embryo transfer window is a highly effective way to address unexplained implantation failure. If you want to discuss ERA testing options, you can schedule a private consultation at Pravi Global IVF.

Frequently Asked Questions

1. Does the ERA test improve IVF success rates?

Yes. For patients with recurrent implantation failure (RIF), performing a personalized transfer based on ERA results can improve pregnancy success rates to **60% to 70%**.

2. How long do ERA test results remain valid?

ERA results are considered stable and valid for at least **2 to 3 years**, provided no major surgeries or uterine changes occur.

Conclusion

The development of the endometrial receptivity analysis ERA test represents a major advancement in personalized fertility care. By replacing standard timelines with genetic data matching your body's specific receptivity window, it optimizes embryo transfer timing.

Our clinical team offers advanced ERA diagnostics and personalized transfer protocols. Contact Pravi Global IVF today to schedule your consultation.