Why Is the ERA Test Performed?
During each menstrual cycle, the uterus has a short period known as the implantation window, when the endometrium is most receptive to embryo implantation.
In some patients, this implantation window may occur earlier or later than expected. When embryo transfer is performed outside this window, implantation may fail even when high-quality embryos are used.
The ERA Test helps fertility specialists:
- Identify the patient’s individual implantation window
- Determine when the endometrium is most receptive
- Avoid embryo transfer at the wrong time
- Improve the chances of successful implantation
Who Should Consider the ERA Test?
ERA testing may be recommended for patients in several clinical situations.
Recurrent Embryo Transfer Failure
Patients who have experienced two or more unsuccessful embryo transfers may benefit from ERA testing.
Failed Frozen Embryo Transfer Cycles
Patients who experience repeated implantation failure during frozen embryo transfer (FET) cycles.
Pregnancy Failure Despite High-Quality Embryos
Cases where high-grade embryos (for example 4AA or 5AA) were transferred but pregnancy did not occur.
Endometrial Receptivity Concerns
Situations where the uterine lining appears normal but implantation still fails.
Patients Seeking a Personalized IVF Strategy
ERA testing allows fertility specialists to create a more individualized embryo transfer plan.
How Is the ERA Test Performed?
The ERA Test involves collecting a small sample of endometrial tissue and analyzing its genetic expression.
1. Preparation Phase
A hormonal protocol is used to prepare the uterus for the expected embryo transfer day. This typically includes estrogen and progesterone support.
2. Endometrial Biopsy
A small biopsy sample of the endometrial lining is collected.
The procedure:
- Takes about 5–10 minutes
- Is generally well tolerated
- Does not require hospitalization
3. Laboratory Analysis
The tissue sample is sent to a specialized genetic laboratory where the expression of more than 200 genes associated with endometrial receptivity is analyzed.
4. Result Interpretation
ERA test results are typically classified as:
Receptive
The uterus is ready for embryo transfer on the tested day.
Pre-Receptive
The implantation window occurs later than expected.
Post-Receptive
The implantation window occurred earlier than expected.
Based on the results, embryo transfer timing can be adjusted specifically for the patient.
Advantages of the ERA Test
The ERA Test offers several potential benefits for patients undergoing IVF treatment.
Possible advantages include:
- Personalized embryo transfer timing
- Improved implantation rates in selected patients
- Reduced risk of repeated implantation failure
- More precise IVF treatment planning
How Long Do ERA Test Results Take?
ERA test results are usually available within 10–14 days, depending on the laboratory processing time.
Once the results are ready, fertility specialists can plan the embryo transfer according to the patient’s personalized implantation window.
ERA Testing at Dogus IVF Center
At Dogus IVF Center Cyprus, ERA testing may be recommended for patients who have experienced repeated IVF implantation failure.
By identifying the optimal implantation window, the ERA Test helps specialists adjust embryo transfer timing and support more personalized fertility treatment strategies.
