In vitro fertilization with PGD or PGS
An embryo biopsy is required to obtain a sample for testing in genetic laboratory. The embryo biopsy is critical, and may damage an embryo irreversibly if done incorrectly. The embryos are biopsied by removing 3-5 cells from the trophectoderm, or outer coat, of the embryo. They are then sent to the lab for genetic analysis. After a period of 10-14 days, we can determine which embryo is genetically normal for transfer.
The embryo transfer will occur after two and a half weeks of hormonal preparation to help the uterus get in optimal condition for transfer. In patients who desire PGS or genetically testing the embryos for chromosomal abnormalities, there is no need to create a genetic probe and the embryos are tested in the same process.