1. Gwazdauskas FC, Nebel RL, Sprecher DJ, Whittier WD and McGillard. Effectiveness of rump-mounted devices and androgenized female for detection of estrus in dairy cattle. J Dairy Sci. 1990. 73: 2965-2970

2. Kim IH, Kim UH, Suh GH, Kang HG. Factors affecting estrus exhibition and conception following a single administration of PGF2α in dairy cows. J Vet. Clin. 2006. 23: 453-457

3. Lopez-Gartius F. Presence of multiple corpora lutea affects the luteolytic response to prostaglandin F2α in lactating dairy cows. J Reprod. Dev. 2021. 67: 135-139

4. Manns JG and Hafs HD. Controlled breeding in cattle: A review. Can. J Anim. Sci. 1976. 56: 121-13

5. Odde KG. A review of synchronization of estrus in postpartum cattle. J. Anim. Sci. 1990. 68: 817-830

6. Peralta OA, Pearson RE and Nebel RL. Comparison of three estrus detection systems during summer in a large commercial dairy herd. Anim. Reprod. Sci. 2005. 87: 59-72

7. Rabiee AR, Lean IJ, Stevenson MA. Efficiency of Ovsynch program on reproductive performance in dairy cattle: A meta-analysis. 2005. J Dairy Sci. 88: 2754-2770