This procedure involves using a highly focused infrared laser beam to remove the outer covering of the embryo, and help the embryo hatch from its protective outer shell and promote implantation in the uterine wall after the embryo transfer. During the cleavage stage, the outer covering of the embryo becomes harder and the removing of the egg for in vitro fertilization effects its natural environment. Laser assisted hatching is one method that helps the fertilized egg to hatch and attach to the uterus. The idea behind the process is that the small slit in the shell of the embryo improves its ability to hatch. This problem is high in women older than 37 years of age or in the women who have taken higher doses of follicle stimulating hormones.