When to perform endometrial biopsy for ERA

The endometrial biopsy for the ERA test is easily performed during a gynecological consultation without the need for anesthesia or surgery. Using a cannula, the gynecologist will gently scrape the uterine fundus to obtain a portion of endometrial tissue.

The exact day to perform the biopsy is at the beginning of the supposed implantation window, on day LH+7. Specifically, this is 7 after the peak of the LH hormone triggers ovulation in the middle of the menstrual cycle.