Effect of Interval to Resynchronization of Ovulation on Fertility of Lactating Holstein Cows When Using Transrectal Ultrasonography or a Pregnancy-Associated Glycoprotein Enzyme-Linked Immunosorbent Assay to Diagnose Pregnancy Status
Journal of Dairy Science - United States
doi 10.3168/jds.2008-1704
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Date
August 1, 2009
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American Dairy Science Association