In this image we see the process to follow step by step when it comes to PGD embryo testing.
To begin with, it would be necessary to fertilize the eggs and sperm in the laboratory in order to generate the embryos. Normally, these embryos are kept in culture until day 3 of development.
The embryo is then biopsied, a cell is removed and placed in the tube (tubing) for genetic analysis. In this way, it will be possible to know which embryos are genetically normal and which ones have some genetic alteration and, therefore, must be discarded for the transfer.