There is a small chance that an embryo biopsy may harm the embryo. This could lower the chance for pregnancy. Babies born after embryo biopsy and PGT do not have an increased rate of birth defects when compared to babies born after IVF without embryo biopsy. No other known problems with embryo biopsy or PGT have been reported at this time. However, since embryo biopsy is still a newer procedure, a small chance of increased harm cannot be ruled out.