Summers, Anne M <br/><br/>
Contingent screening for Down syndrome.  [electronic resource] 

 -  Prenatal diagnosis  Oct 2005 
 - 963 p.  digital 
<br/><br/> Publication Type: Comment; Letter 
<br/><br/><label>ISSN: </label>0197-3851 
<br/><br/><label>Standard No.: </label>10.1002/pd.1245  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Down Syndrome--diagnosis<br/>Female<br/>Humans<br/>Pregnancy<br/>Prenatal Diagnosis--methods<br/>Risk