Reply. 

 -  2014 
<br/><br/><br/>English 
<br/><br/><label>ISSN: </label>0278-4297 
<br/><br/><label>Subjects--Topical Terms: </label><br/>*Anatomic Landmarks/us [Ultrasonography]<br/>*Congenital Abnormalities/us [Ultrasonography]<br/>*Fetal Diseases/us [Ultrasonography]<br/>*Patient Positioning/st [Standards]<br/>*Practice Guidelines as Topic<br/>*Pregnancy Complications/us [Ultrasonography]<br/>*Ultrasonography, Prenatal/st [Standards]<br/>Female<br/>Humans<br/>Male<br/>Pregnancy
<br/><br/><label>Subjects--Geographic Terms: </label><br/>MedStar Washington Hospital Center
<br/><br/><label>Index Terms--Occupation: </label><br/>Obstetrics and Gynecology, Maternal-Fetal Medicine
<br/><br/><label>Index Terms--Function: </label><br/>Comment<br/>Letter