de Graaf, F <br/><br/>
[Progesterone and estrogen concentrations in the peripheral blood of heifers in relation to the course of calving].  [electronic resource] 

 -  Tijdschrift voor diergeneeskunde  Dec 1982 
 - 941-9 p.  digital 
<br/><br/> Publication Type: English Abstract; Journal Article 
<br/><br/><label>ISSN: </label>0040-7453 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Animals, Newborn<br/>Biometry<br/>Birth Weight<br/>Cattle--blood<br/>Dystocia--veterinary<br/>Estrogens--blood<br/>Female<br/>Fetal Death--veterinary<br/>Male<br/>Pregnancy<br/>Pregnancy, Animal<br/>Progesterone--blood<br/>Species Specificity<br/>Time Factors