The embryo implantation window opening is an important stage in the outcome of the fertilization process. Especially with the artificial insemination method, determining the time of embryo implantation window opening is even more important, it directly affects the success rate of this process.

IVF or in vitro fertilization is a fertilization method in which the egg is fertilized by sperm outside the body, in a test tube. The success rate of this method depends on many factors, in which the environment for the embryo to implant and develop in the uterine lining plays an important role. Therefore, the ERA testing method was born to improve the success rate of IVF.