PGT-A (preimplantation genetic testing for aneuploidy)
Also written as PGS
A test on cells biopsied from an embryo to check for the correct number of chromosomes before transfer.
In plain English
It's a test on a small sample of cells from your embryo, checking whether it has the right number of chromosomes before you decide which one to transfer.
Why it matters
It can help identify embryos less likely to result in miscarriage due to chromosome numbers, but it involves a biopsy and doesn't guarantee a live birth.
Related terms
Guides that cover this
Sources
- Treatment add-ons with limited evidence, HFEA. Link checked 17 September 2026.
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