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Hanlon DW, Jarratt GM, Davidson PJ, Millar AJ, Douglas VL. The effect of hCG administration five days after insemination on the first service conception rate of anestrous dairy cows. Theriogenology. 2005 Apr 15;63(7):1938–45. doi: 10.1016/j.theriogenology.2004.09.002. PMID: 15823350. |