Endometrial Receptivity Analysis (ERA)
WHAT IS ENDOMETRIAL RECEPTIVITY ANALYSIS (ERA)
ERA® (Endometrial Receptivity Analysis) is an advanced diagnostic test used to determine the exact timing when the uterus is most receptive for embryo implantation. It helps identify each woman’s unique window of implantation, allowing a personalized embryo transfer for better success rates.
At Freya Fertility, ERA® is used to maximize pregnancy chances, especially in patients who have experienced repeated IVF failures despite transferring good-quality embryos.
ERA® is beneficial for patients who:
- Have recurrent implantation failure (RIF)
- Have repeated IVF failures with good embryos
- Have unexplained infertility
- Want personalized embryo transfer timing
- Want to avoid losing good embryos
WHY ERA® IS IMPORTANT
Even the best embryo will fail to implant if the uterine environment is not ready. Successful implantation depends not only on embryo quality but also on the timing of transfer.
- The uterus must be receptive at the exact time of embryo transfer
- Transfer should be neither too early nor too late
- Each woman has a unique implantation window
👉 Studies show that 3 in 10 women may have a displaced window of implantation, which can lead to repeated IVF failures.
WHAT IS THE ENDOMETRIUM?
The endometrium is the inner lining of the uterus that prepares every month to receive an embryo. It acts as a “nest” where the embryo implants and grows during pregnancy.
A healthy and receptive endometrium is essential for successful implantation.
WHAT IS ENDOMETRIAL RECEPTIVITY?
Endometrial receptivity refers to the phase when the uterine lining is ready to accept an embryo. This period is known as the window of implantation.
- It is a time-sensitive phase
- It varies from woman to woman
- In some cases, the window may be shifted or shortened
ERA® helps identify this personalized window to improve pregnancy outcomes.
WHAT IS ERA® TEST?
ERA® is a molecular diagnostic test that analyzes gene expression in the endometrium to determine whether it is receptive or not at a specific time.
It allows doctors to perform a Personalized Embryo Transfer (pET) at the optimal time for implantation.
HOW ERA® HELPS IN FERTILITY
ERA® improves IVF outcomes by:
- Identifying the exact implantation window
- Avoiding embryo transfer at the wrong time
- Increasing chances of implantation
- Reducing repeated IVF failures
- Preventing loss of good-quality embryos
Cycle Planning (Mock Cycle)
A cycle is prepared similar to an IVF cycle using hormonal medications to mimic real embryo transfer conditions.
Endometrial Preparation
The uterine lining is developed using estrogen and progesterone to reach optimal thickness.
Endometrial Biopsy
A small sample of the endometrial tissue is taken at a specific time using a thin catheter. Takes only a few minutes Mild discomfort may be felt No anesthesia usually required
Molecular Analysis
The sample is analyzed in a specialized lab to study gene expression patterns that indicate receptivity.
ERA® Result Interpretation
Receptive Result Indicates the uterus is ready for implantation Embryo transfer is done at the same timing in the next cycle Non-Receptive Result Indicates a displaced window of implantation ERA® predicts the correct timing for transfer Personalized embryo transfer is planned 👉 In ~90% of cases, ERA® can identify the correct timing without repeat testing 👉 Only ~10% cases may require a second biopsy
Personalized Embryo Transfer (pET)
Embryo transfer is performed exactly at the identified implantation window.
Pregnancy Test & Follow-Up
Pregnancy is confirmed after 10–14 days, followed by monitoring.
Freya Fertility
Our Success Highlights
Improved implantation rates with personalized embryo transfer
Increase in pregnancy success in RIF cases
Committed to Your Parenthood Journey
At Freya Fertility, we focus on precision and personalization in fertility treatments. ERA helps us identify the exact implantation window, ensuring that embryo transfer is done at the most favorable time for success.
FAQs
What is ERA test in IVF?
It is a test that determines the best time for embryo transfer by analyzing uterine receptivity.
Who should consider ERA?
Patients with repeated IVF failures or implantation issues benefit the most.
Is ERA painful?
The biopsy may cause mild discomfort but is generally well tolerated.
Does ERA guarantee pregnancy?
No, but it significantly improves the chances by optimizing transfer timing.
Is ERA done in every IVF cycle?
No, it is usually recommended in specific cases like recurrent implantation failure.