Test the embryo before the transfer.
A few cells are biopsied from each embryo and screened before transfer — so only a genetically healthy embryo is chosen.
What Is PGT, Really?
PGT is a laboratory test performed on IVF embryos before transfer. A handful of cells are biopsied from the outer layer of a day 5–6 blastocyst — the layer that becomes the placenta, not the baby — and sent for genetic analysis while the embryo is safely frozen.
Only embryos that come back genetically normal are thawed and transferred, in a cycle timed separately from the retrieval.
The Three Types of PGT
PGT-A
Screens for the correct number of chromosomes — the leading cause of miscarriage and failed implantation.
PGT-M
Tests for a specific single-gene disorder already known to run in the family.
PGT-SR
Checks for structural chromosome rearrangements when a parent carries a balanced translocation.
Who Genuinely Needs PGT
Advanced maternal age
Chromosomal errors in eggs rise sharply after the mid-30s.
Recurrent pregnancy loss
When two or more miscarriages remain unexplained.
Repeated implantation failure
Good quality embryos that haven't implanted in prior cycles.
A known genetic condition
Carried by either partner or seen in a previous pregnancy.
Key Benefits
- Lowers miscarriage risk from chromosomal causes
- Identifies the embryo most likely to implant
- Biopsy does not harm the embryo
- Combines with ICSI and blastocyst culture
Find Out If PGT Fits Your Case
PGT is not right for every couple. Bring your history and we will tell you honestly whether it changes your odds.