What Is a Mosaic Embryo?

A mosaic embryo contains two or more cell lines with different chromosomal compositions, meaning some cells are chromosomally normal (euploid) and others are abnormal (aneuploid).

Clinical significance

Mosaic embryos present a unique challenge in IVF, as their implantation and developmental potential is less predictable compared to purely euploid or aneuploid embryos. Some clinics consider transferring mosaic embryos if no euploid embryos are available.

Common confusion

Many assume mosaic embryos have the same outcomes as fully aneuploid embryos. In practice, clinical outcomes for mosaic embryos vary and are still the subject of ongoing research.

Related reference

/glossary/euploid →/glossary/aneuploid-embryo →/glossary/pgta →/fertility/ivf-success-rates →/fertility/why-ivf-fails →← Back to Glossary Index

Used in

Euploid Embryo →Aneuploid Embryo →PGT-A →IVF Success Rates →Why IVF Fails →

This content defines terminology for educational orientation. It does not constitute medical advice.

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