Tribble, R L <br/><br/>
Serum progestins and luteinising hormone levels in non-suckled primiparous heifers.  [electronic resource] 

 -  Nature   
 - 494-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/246494a0  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Breast Feeding<br/>Cattle<br/>Estrus<br/>Female<br/>Luteinizing Hormone--blood<br/>Parity<br/>Postpartum Period<br/>Pregnancy<br/>Pregnenediones--blood<br/>Progesterone--blood<br/>Time Factors