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3. 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. Silva E, Sterry RA, Kolb D, Mathialagan N, McGrath MF, Ballam JM, Fricke PM. J Dairy Sci; 2009 Aug; 92(8):3643-50. PubMed ID: 19620645 [Abstract] [Full Text] [Related]
4. Supplementation of progesterone via controlled internal drug release inserts during ovulation synchronization protocols in lactating dairy cows. Chebel RC, Al-Hassan MJ, Fricke PM, Santos JE, Lima JR, Martel CA, Stevenson JS, Garcia R, Ax RL. J Dairy Sci; 2010 Mar; 93(3):922-31. PubMed ID: 20172212 [Abstract] [Full Text] [Related]