Platt, Lawrence D <br/><br/>
Sequential pathways of testing after first-trimester screening for trisomy 21.  [electronic resource] 

 -  Obstetrics and gynecology  Oct 2004 
 - 661-6 p.  digital 
<br/><br/> Publication Type: Evaluation Study; Journal Article; Multicenter Study; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0029-7844 
<br/><br/><label>Standard No.: </label>10.1097/01.AOG.0000139832.79658.b9  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Algorithms<br/>Canada--epidemiology<br/>Chorionic Gonadotropin--blood<br/>Cohort Studies<br/>Decision Trees<br/>Down Syndrome--blood<br/>Estradiol--blood<br/>False Positive Reactions<br/>Female<br/>Humans<br/>Predictive Value of Tests<br/>Pregnancy<br/>Pregnancy Trimester, First<br/>Pregnancy Trimester, Second<br/>Prenatal Diagnosis--methods<br/>Risk Factors<br/>Sensitivity and Specificity<br/>United States--epidemiology<br/>alpha-Fetoproteins