A–Z Glossary

Preimplantation genetic testing

Preimplantation genetic testing evaluates cells biopsied from an embryo before transfer to assess genetic risk during an IVF cycle.

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NIPT accuracy timing and limitations

NIPT accuracy timing and limitations

What NIPT is actually testing NIPT analyzes cell-free DNA fragments in the pregnant person’s bloodstream. A portion of these fragments comes from the placenta and is often used as a proxy for fetal chromosomal status. This is why many clinicians prefer the term cell-free DNA screening: the sample is maternal blood, and the fetal component […]