Johnson, M P <br/><br/>
Fetal leg and femur/foot length ratio: a marker for trisomy 21.  [electronic resource] 

 -  American journal of obstetrics and gynecology  Sep 1993 
 - 557-63 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-9378 
<br/><br/><label>Standard No.: </label>10.1016/0002-9378(93)90620-x  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Anthropometry<br/>Down Syndrome--diagnostic imaging<br/>Female<br/>Femur--anatomy & histology<br/>Fetal Diseases--diagnostic imaging<br/>Foot--anatomy & histology<br/>Humans<br/>Pregnancy<br/>Pregnancy Trimester, Second<br/>Prospective Studies<br/>Regression Analysis<br/>Sensitivity and Specificity<br/>Ultrasonography, Prenatal