Endometrial Receptivity Assay(ERA)

The evaluation of endometrial receptivity during assisted reproductive cycles is supported by diagnostic testing. In this test, a small sample of endometrial tissue is collected to evaluate the timing when the uterine lining is responsive to embryo transfer. Clinical factors such as uterine receptivity and endometrial parameters are assessed with this diagnostic technique.

When is it done?

Recurrent Implantation Failure (RIF)

In cases of RIF, clinical evaluations often examine the timing of embryo transfer. When embryo transfer timing requires precise assessment, the clinician performs an ERA procedure to determine individual parameters. Further diagnostic investigations may also evaluate genetic or structural factors.

Unsuccessful IVF Cycles

Patients with a history of unsuccessful IVF cycles may be evaluated with an ERA procedure. ERA testing assists the specialist in identifying the personalized window of implantation. This diagnostic test may also be utilized in frozen embryo transfer cycles.

Limited Number of Embryos

Patients of advanced maternal age may consider an ERA, as oocyte cohort quality can vary. Optimizing embryo utilization timing is an important consideration in clinical management.

Tools Used To Study Endometrial Receptivity

Ultrasound

Endometrial evaluation can be assisted by ultrasound imaging. Endometrial ultrasound assists in determining endometrial volume, thickness, and pattern parameters.

Endometrial Genetic Tests

To evaluate endometrial status, molecular diagnostic techniques such as transcriptomic analysis may be utilized to assess gene expression patterns.

Histological Analysis

Histological evaluation of the endometrium is performed via endometrial biopsy to assess cellular architecture under clinical protocols.

Procedural Details

• The initial step of an ERA procedure involves endometrial tissue sampling. Prior to sample collection, hormone replacement protocols including progesterone supplementation are administered for a specified duration.
• Following collection, sample gene expression is analyzed to evaluate endometrial maturation status.
• The procedure involves performing an endometrial biopsy where a fine catheter is introduced into the uterine cavity via the cervix to obtain a tissue sample.
• Collected samples are processed in specialized laboratories to analyze specific molecular markers and provide insight into endometrial receptivity phases.

Potential Results

The ERA evaluation characterizes endometrial phases into physiological categories, including:

• Pre-receptive: Phase preceding the optimal implantation window
• Early receptive: Phase approaching the optimal implantation window
• Receptive: The optimal implantation window timeframe
• Late receptive: Phase as the implantation window concludes
• Post receptive: Phase following the open implantation window

Benefits

An ERA is a structured diagnostic procedure with clinical benefits, including:

• Structured Clinical Evaluation
• Personalized Treatment Planning
• Optimized Timing of Embryo Transfer
• Personalized Assessment for Implantation Protocols