Implantation of embryos. The way for the improvement of the cumulative life birth rate (CLBR) in the assisted reproductive technology (ART).

Despite the willingness, humans belong to the species with the limited procreation possibilities. Infertility affects about 15% of population is the very important subject for the reproductive medicine. An assisted reproductive technology (ART) offers the significant chance for the infertile couples, but it does not give the guarantee for the pregnancy and for the birth of a healthy child. The implantation of embryo, despite numerous trials and attempts, remain the last barrier in the assisted reproduction technologies; thus, the endometrial receptivity becomes the subject of permanent interest. In this review we have tried to present various methods of improvement of an endometrial receptivity with the conclusion that we still wait for the valuable prognostic factor in the treatment of infertility by ART which could predict the chance for the birth of a healthy child.