Understanding Your PGT Report

A guide to the terminology used in PGT-A, PGT-M and PGT-SR reports.

Category: Reproductive Genetics · Document ID: OGI-PGT-007 · Version 1.0 · Reviewed August 2026

Start with the test type

Confirm whether the report is PGT-A, PGT-M, PGT-SR or a combination. Each answers a different genetic question.

Frequently asked questions about your PGT report

Key points

Match every result to the correct embryo ID.
Do not interpret ‘no result’ as normal.
Ask the fertility/genetics team to explain any mosaic or complex finding.

Embryo identifiers

PGT reports usually use embryo or biopsy identifiers. These must match the embryology laboratory’s chain of identity. Do not compare embryos by memory or informal labels.

PGT-A terminology

Common terms include euploid, aneuploid, mosaic, segmental abnormality and no result. Some reports also describe the chromosome finding using cytogenetic or copy-number notation.

PGT-M terminology

Reports may classify embryos as affected, unaffected, carrier, non-carrier or inconclusive depending on the inheritance pattern and validated assay.

What 'no result' means

No result means the laboratory could not confidently classify that biopsy. It does not mean normal or abnormal.

Embryo ranking

Genetic results are only one part of embryo-selection decisions. Embryology grade, development, clinical history and patient preferences may also be considered.

Limitations section

Read the limitations carefully. It explains what the assay does not detect, the risk of technical error, the potential effect of mosaicism and whether prenatal confirmation should be considered.

This resource is for general education and does not replace individual medical, genetic, legal or laboratory advice.

Clinical reference sources

Need help understanding your PGT report?

Speak with our reproductive genetics team for personalized counselling.