Merz, E <br/><br/>
Risk calculation of fetal chromosomal defects in the first trimester.  [electronic resource] 

 -  Ultraschall in der Medizin (Stuttgart, Germany : 1980)  Oct 2005 
 - 377-8 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>0172-4614 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Congenital Abnormalities--diagnostic imaging<br/>Female<br/>Humans<br/>Pregnancy<br/>Pregnancy Trimester, First<br/>Risk Factors<br/>Ultrasonography