Biological explanations for discordant noninvasive prenatal test results: Preliminary data and lessons learned.

ABSTRACT:

Objective

Maternal plasma cell-free DNA (cfDNA) analysis is a powerful screening tool for Down syndrome. In a pilot series, we examined biologic causes of discordance between the cfDNA test results and the fetal karyotype. We also explored the feasibility of obtaining trio biospecimens by using parental engagement.

Methods

A convenience sample of women with discordant cfDNA results were recruited by their care providers. We provided shipping materials and instructions for biospecimen collection. Maternal, newborn, and placental samples were examined with droplet digital PCR.

Results

Thirteen of 15 women successfully had biospecimens obtained remotely. High-quality DNA was extracted in 12 of 13 women. Presumed biologic etiologies for discordance were identified in 7 of

SUBMITTER: Wilkins-Haug L 

PROVIDER: S-EPMC6721610 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature