Guo, Fang-Fang <br/><br/>
Association between fetal fraction at the second trimester and subsequent spontaneous preterm birth.  [electronic resource] 

 -  Prenatal diagnosis  12 2019 
 - 1191-1197 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1097-0223 
<br/><br/><label>Standard No.: </label>10.1002/pd.5566  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Cell-Free Nucleic Acids--analysis<br/>Female<br/>Humans<br/>Pregnancy<br/>Pregnancy Trimester, Second--blood<br/>Premature Birth--blood<br/>Retrospective Studies