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First trimester combined test and integrated tests for screening for Down syndrome and trisomy 18

INTRODUCTION

First trimester and integrated screening tests for Down syndrome and trisomy 18 will be reviewed here. Other aspects of Down syndrome screening are discussed separately:

(See "Down syndrome: Prenatal screening overview".)

(See "Second trimester maternal serum screening for Down syndrome".)

(See "Laboratory issues related to maternal serum screening for Down syndrome".)

(See "Sonographic findings associated with fetal aneuploidy".)

                          

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Literature review current through: Oct 2014. | This topic last updated: Sep 19, 2013.
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