Assisted Hatching
The embryo at day 2 or 3 after fertilization, consists of four or eight cells and a zona pellucida, which is a kind of wrapper that protects the embryo in its early development days, and it breaks on the sixth day for the embryo to go out and be implemented into the endometrium or into the uterine wall.
In some cases, due to different causes, this hatching does not occur naturally. To solve this problem we apply the assisted hatching, which involves making a small hole in the zona pellucida prior its transfer, to easy its emergence on the sixth day after fertilization, thus giving a higher rate of embryo implantation and therefore gestation.
Fragment Removal
The removal of fragments are applied to those embryos that have a large number of fragments among cells thereby preventing their normal development to the blastocyst stage.

These two techniques are applied in cases where there have been previous failures of implantation, in which the quality and the embryos´ development is not adequate, in which the patient's age is high, in those cases where the the zona pellucida of the embryo is abnormally thickened and / or when the embryo contains many fragments. |