Marshall, D E <br/><br/>
Cannulation in situ of equine umbilicus. Identification by gas chromatography-mass spectrometry (GC-MS) of differences in steroid content between arterial and venous supplies to and from the placental surface.  [electronic resource] 

 -  The Journal of steroid biochemistry and molecular biology  Mar 1999 
 - 219-28 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0960-0760 
<br/><br/><label>Standard No.: </label>10.1016/s0960-0760(99)00034-5  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Androstadienes--blood<br/>Animals<br/>Catheterization<br/>Estrogens--blood<br/>Female<br/>Fetal Blood<br/>Gas Chromatography-Mass Spectrometry<br/>Horses<br/>Placenta--blood supply<br/>Umbilicus--blood supply