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Article

Fetal fraction in maternal plasma cell-free DNA at 11-13 weeks' gestation: relation to maternal and fetal characteristics.

Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology - 1 Jan 2013

Ashoor G, Syngelaki A, Poon L C Y, Rezende J C, Nicolaides K H

Abstract excerpt

OBJECTIVE: To examine the possible effects of maternal and fetal characteristics on the fetal fraction in maternal plasma cell-free (cf) DNA at 11-13 weeks' gestation and estimate the proportion of pregnancies at high risk of non-invasive prenatal testing (NIPT) failure because the fetal fraction is less than 4%. METHODS: In 1949 singleton pregnancies at 11-13 weeks' gestation cf-DNA was extracted from maternal...

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PMID: 23108725
DOI: 10.1002/uog.12331

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 6 Sept 2026. Manifest publication-graph-cohort-2026-09-06.1.

Source receipt: pubmed, retrieved 6 Sept 2026.

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