ERA
What is an Endometrial Receptivity Array (ERA)?
An Endometrial Receptivity Array (ERA) is a specialized test used during IVF treatment to determine the most optimal time for embryo implantation.
It is especially helpful for women who have experienced repeated implantation failures, even when high-quality embryos were transferred.
What is Embryo Implantation? Embryo implantation is the natural process where a fertilized egg (embryo) attaches to the uterine lining (endometrium), allowing pregnancy to begin.
In a natural pregnancy:
The embryo forms in the fallopian tube, then travels to the uterus for implantation.
In IVF:
The embryo is created in the lab and is directly transferred into the uterus through a painless procedure.
For implantation to be successful, the uterine lining must be “receptive.” This receptivity is controlled by hormones—primarily estrogen and progesterone—which thicken the endometrial lining and prepare it for the embryo.
How Does ERA Help? The ERA test analyzes a small sample of the endometrial tissue to determine the exact time your uterus is most receptive for implantation—known as your personalized “implantation window.”
Benefits:
Increases the chances of successful embryo implantation.
Helps tailor embryo transfer timing precisely to your body’s cycle.
Particularly useful for women with unexplained IVF failures.
At Rajni Fertility Centre, we use ERA testing as part of our personalized IVF care to maximize your chances of achieving a healthy pregnancy.