Gjerris, A C <br/><br/>
First-trimester screening in pregnancies conceived by assisted reproductive technology: significance of gestational dating by oocyte retrieval or sonographic measurement of crown-rump length.  [electronic resource] 

 -  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology  Oct 2008 
 - 612-7 p.  digital 
<br/><br/> Publication Type: Comparative Study; Evaluation Study; Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1469-0705 
<br/><br/><label>Standard No.: </label>10.1002/uog.6128  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Body Weight--physiology<br/>Chorionic Gonadotropin, beta Subunit, Human--metabolism<br/>Chromosome Disorders--diagnosis<br/>Cohort Studies<br/>Crown-Rump Length<br/>Female<br/>Gestational Age<br/>Humans<br/>Oocyte Retrieval<br/>Pregnancy<br/>Pregnancy Trimester, First<br/>Pregnancy-Associated Plasma Protein-A--metabolism<br/>Prospective Studies<br/>Reproductive Techniques, Assisted<br/>Sensitivity and Specificity<br/>Ultrasonography, Prenatal--methods