Fertility Glossary

PGT-A

Testing embryos for the wrong number of chromosomes.

PGT-A screens for aneuploidy. Evidence that it improves the chance of a baby per cycle started is mixed, and it does not create better embryos. Discuss the likely benefit for your own situation before agreeing to it.

Related terms

Aneuploidy

An abnormal number of chromosomes.

Euploid embryo

An embryo with the expected number of chromosomes on testing.

Mosaic embryo

An embryo whose biopsy shows a mixture of normal and abnormal cells.

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