Gallagher, P <br/><br/>
Potential placenta previa: definition, frequency, and significance.  [electronic resource] 

 -  AJR. American journal of roentgenology  Nov 1987 
 - 1013-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0361-803X 
<br/><br/><label>Standard No.: </label>10.2214/ajr.149.5.1013  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Female<br/>Humans<br/>Placenta Previa--diagnosis<br/>Pregnancy<br/>Pregnancy Trimester, Second<br/>Pregnancy Trimester, Third<br/>Prospective Studies<br/>Ultrasonography