Reuss, M L <br/><br/>
Early ultrasound dating of pregnancy: selection and measurement biases.  [electronic resource] 

 -  Journal of clinical epidemiology  May 1995 
 - 667-74 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0895-4356 
<br/><br/><label>Standard No.: </label>10.1016/0895-4356(94)00162-j  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Female<br/>Gestational Age<br/>Humans<br/>Menstruation<br/>Multivariate Analysis<br/>Pregnancy<br/>Pregnancy Complications--diagnostic imaging<br/>Prospective Studies<br/>Selection Bias<br/>Ultrasonography, Prenatal<br/>Uterine Hemorrhage--diagnostic imaging