Journal Mobile Options
Table of Contents
Vol. 31, No. 4, 2012
Issue release date: June 2012
Section title: Original Paper
Fetal Diagn Ther 2012;31:237–243
(DOI:10.1159/000337373)

Fetal Fraction in Maternal Plasma Cell-Free DNA at 11–13 Weeks’ Gestation: Effect of Maternal and Fetal Factors

Ashoor G.a · Poon L.a · Syngelaki A.a · Mosimann B.a · Nicolaides K.H.a, b
aHarris Birthright Research Centre for Fetal Medicine, King’s College Hospital, and bDepartment of Fetal Medicine, University College Hospital, London, UK

Do you have an account?

Register and profit from personalized services (MyKarger) Login Information

Please create your User ID & Password





Contact Information









I have read the Karger Terms and Conditions and agree.

Register and profit from personalized services (MyKarger) Login Information

Please create your User ID & Password





Contact Information









I have read the Karger Terms and Conditions and agree.

To view the fulltext, please log in

To view the pdf, please log in

Buy

  • FullText & PDF
  • Unlimited re-access via MyKarger (new!)
  • Unrestricted printing, no saving restrictions for personal use
  • Reduced rates with a PPV account
read more

Direct: USD 38.00
Account: USD 26.50

Select

Rent/Cloud

  • Rent for 48h to view
  • Buy Cloud Access for unlimited viewing via different devices
  • Synchronizing in the ReadCube Cloud
  • Printing and saving restrictions apply

Rental: USD 8.50
Cloud: USD 20.00

Select

Subscribe

  • Access to all articles of the subscribed year(s) guaranteed for 5 years
  • Unlimited re-access via Subscriber Login or MyKarger
  • Unrestricted printing, no saving restrictions for personal use
read more

Subcription rates


Select


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 1/19/2012 8:43:25 PM
Accepted: 2/14/2012
Published online: 5/4/2012
Issue release date: June 2012

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 2

ISSN: 1015-3837 (Print)
eISSN: 1421-9964 (Online)

For additional information: http://www.karger.com/FDT

Abstract

Objective: It was the aim of this study to examine the possible effects of maternal and fetal characteristics on the fetal fraction in maternal plasma cell-free DNA (cfDNA) at 11–13 weeks’ gestation. Methods: In a nested case-control study, cfDNA was extracted from maternal plasma obtained before chorionic villous sampling from 300 euploid, 50 trisomy 21 and 50 trisomy 18 pregnancies at 11–13 weeks’ gestation. Chromosome-selective sequencing of maternal cfDNA non-polymorphic and polymorphic loci, where fetal alleles differ from maternal alleles, was used to determine the proportion of DNA which is of fetal origin. Multivariate regression analysis was used to determine which of the factors amongst maternal weight, racial origin, smoking status, plasma storage time, serum pregnancy-associated plasma protein (PAPP)-A and free β-subunit of human chorionic gonadotropin (β-hCG), fetal crown-rump length, nuchal translucency thickness, gender and karyotype were significant predictors of the fetal fraction. Results: Significant independent prediction of fetal fraction was provided by maternal weight, serum PAPP-A and serum free β-hCG multiples of the median, but not by other maternal characteristics, fetal karyotype, crown-rump length or nuchal translucency thickness. Fetal fraction increased with serum metabolite levels and decreased with maternal weight. Conclusions: The fetal fraction in maternal plasma cfDNA increases with serum PAPP-A and free β-hCG and decreases with maternal weight.

© 2012 S. Karger AG, Basel


  

Article Information

Received: January 19, 2012
Accepted after revision: February 14, 2012
Published online: May 4, 2012
Number of Print Pages : 7
Number of Figures : 4, Number of Tables : 2, Number of References : 33

  

Publication Details

Fetal Diagnosis and Therapy (Clinical Advances and Basic Research)

Vol. 31, No. 4, Year 2012 (Cover Date: June 2012)

Journal Editor: Gratacós E. (Barcelona)
ISSN: 1015-3837 (Print), eISSN: 1421-9964 (Online)

For additional information: http://www.karger.com/FDT


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 1/19/2012 8:43:25 PM
Accepted: 2/14/2012
Published online: 5/4/2012
Issue release date: June 2012

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 2

ISSN: 1015-3837 (Print)
eISSN: 1421-9964 (Online)

For additional information: http://www.karger.com/FDT


Copyright / Drug Dosage / Disclaimer

Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.