What is an ERA Test?

The Endometrial Receptivity Array ERA test studies the gene expression profile of the endometrium at the time of embryo transfer. It is supposed to determine the best time for an embryo transfer to help doctors in fine-tuning the time of Embryo transfer.

Other pathologies like Hydrosalpinx, Fibroids, Adenomyosis and adenomas, pelvic adhesion etc., impact uterine receptivity. They have to be evaluated and addressed appropriately.

How does an ERA test help?

ERA aids in identifying the fertile window for embryo implantation by analyzing the gene expression patterns in the endometrium. This personalized approach improves the chances of successful embryo implantation and subsequent pregnancy.

Recent studies however question the effectiveness of the ERA test. Some of the 2024 publications suggest that ERA can not predict window of implantation correctly 

Who should opt for ERA Testing?

Couples undergoing IVF treatment, especially those with a history of implantation failure, recurrent pregnancy loss, or unexplained infertility, should consider opting for ERA. It provides valuable insights into the endometrial receptivity, guiding the timing of embryo transfer for better outcomes.

How does ERA testing work?

Here’s how ERA testing typically works:

  • Biopsy: A sample of the endometrial lining is taken during a specific phase of the menstrual cycle.
  • Gene Analysis: The biopsy is analyzed to check the expression levels of genes related to endometrial receptivity.
  • Result Interpretation: Results are compared to norms to determine if the endometrium is receptive, non-receptive, or displaced.
  • Timing Adjustment: Helps fertility specialists pinpoint the best timing for embryo transfer during IVF based on receptivity status.
  • Treatment Tailoring: If abnormalities are found, treatments can be adjusted to optimize endometrial preparation for implantation.

Understanding ERA Test Results

Understanding ERA (Endometrial Receptivity Array) test results involves interpreting whether the endometrium is receptive or non-receptive during the window of implantation. The results typically fall into one of the following categories:

  • Receptive: This indicates that the endometrium is in the optimal receptive state for embryo implantation. In this case, embryo transfer would be recommended within the window of implantation, increasing the likelihood of successful implantation and pregnancy.

  • Non-Receptive: A non-receptive result suggests that the endometrium is not in the optimal state for embryo implantation during the window of implantation. This could mean that the timing of embryo transfer needs to be adjusted, either by advancing or delaying it, to match the individual’s unique endometrial receptivity pattern.

  • Indeterminate: Sometimes, the test may yield inconclusive or indeterminate results. This could occur due to technical issues with the sample or other factors. In such cases, further evaluation or retesting may be necessary to obtain a clearer understanding of the endometrial receptivity.

Understanding the ERA test results is crucial for optimizing the timing of embryo transfer and improving the chances of successful implantation and pregnancy during assisted reproductive treatments. Your healthcare provider will interpret the results and recommend appropriate steps based on your individual circumstances and treatment plan.

era test

Advantages of an Endometrial Receptivity Array

  • Personalized embryo transfer timing.
  • Potential Improved success rates in IVF cycles.
  • Potential to reduce the number of failed implantations.
  • Enhances patient satisfaction and confidence in fertility treatment.

Disadvantages of ERA test

  • Although the concept and method of ERA test appears promising in real world scenario results are not proven with enough statistical power.
  • Some studies in reputed journals suggest that ERA test can not accurately predict the window of implantation, which is the sole purpose of this test. This may reduce success rates of IVF treatment rather than improving it.

What is the Success Rate for ERA Testing?

The success rate of ERA testing lies in its ability to personalize the timing of embryo transfer, thereby increasing the chances of successful implantation and pregnancy. However, success rates may vary depending on individual circumstances and clinic protocols.

Embryo quality still remains the crucial denominator for success of any IVF treatment 

How to prepare for an Endometrial Receptivity Array Testing?

  1. Consult with your healthcare provider.
  2. Track your menstrual cycle.
  3. Adjust medication as advised.
  4. Avoid substances that could interfere.
  5. Ask any questions you have.


The success rate of ERA testing lies in its ability to personalize the timing of embryo transfer, thereby increasing the chances of successful implantation and pregnancy. However, success rates may vary depending on individual circumstances and clinic protocols.

Recent studies do not suggest that ERA testing may improve IVF results.

The cost of ERA testing can vary depending on factors such as the clinic, location, and additional services included. It’s advisable to consult with your fertility clinic for specific pricing details and potential insurance coverage.

Our Locations

    Book an Appointment

    Your family building is just your decision away. Reach us NOW, fill this form and we will respond ASAP, Together, we will succeed.