1-A.R. Heravi Moussavi , M. Danesh Mesgaran and T. Vafa. Factors affecting reproductive performance of Holstein Dairy Cows. Journal of Ruminant Research, Vol. 1 (2), 2013
2-M. Karimi-Dehkordi and M. Yahyaei. Determining the diagnostic value of calcium in prediction of reproductive performance of Holstein dairy cows. Journal of Ruminant Research, Vol. 8(3), 2020
3- Borsberry, S., and Dobson, H. 1989. Periparturient diseases and their effect on reproductive performance in five dairy herds. The Veterinary Record, 124(9), 217-219.
4- Chamberlin, W. G., Middleton, J. R., Spain, J. N., Johnson, G. C., Ellersieck, M. R., and Pithua, P. 2013. Subclinical hypocalcemia, plasma biochemical parameters, lipid metabolism, postpartum disease, and fertility in postparturient dairy cows. Journal of dairy science, 96(11), 7001-7013.
5- Edmondson, A. J., Lean, I. J., Weaver, C. O., Farver, T. and Webster G. 1989. A body condition scoring chart for Holstein dairy cows. Journal of Dairy Science, 72(8):68-78.
6- Ferguson, J. D., Azzaro, G. and Licitra, G. 2006. Body condition assessment using digital images. Journal of Dairy Science, 89 (6):3833-3841.
7- Jawor, P. E., J. M. Huzzey, S. J. LeBlanc, and M. A. G. von Keyserlingk. 2012. Associations of subclinical hypocalcemia at calving with milk yield, and feeding, drinking, and standing behaviors
around parturition in Holstein cows. J. Dairy Sci. 95:1240–1248.
8- Jeong, J. K., Kang, H. G., and Kim, I. H. 2018. Associations between serum calcium concentration and postpartum health and reproductive performance in dairy cows. Animal reproduction science, 196, 184-192.
9- LeBlanc, S. J., Leslie, K. E., and Duffield, T. F. 2005. Metabolic predictors of displaced abomasum in dairy cattle. Journal of dairy science, 88(1), 159-170.
10- Martinez, N., Risco, C. A., Lima, F. S., Bisinotto, R. S., Greco, L. F., Ribeiro, E. S., ... and Santos, J. E. P. 2012. Evaluation of peripartal calcium status, energetic profile, and neutrophil function in dairy cows at low or high risk of developing uterine disease. Journal of dairy science, 95(12), 7158-7172.
11- Martinez, N., Sinedino, L. D. P., Bisinotto, R. S., Daetz, R., Lopera, C., Risco, C. A., ... and Santos, J. E. P. 2016. Effects of oral calcium supplementation on mineral and acid-base status, energy metabolites, and health of postpartum dairy cows. Journal of dairy science, 99(10), 8397-8416.
12- Martinez, N., Sinedino, L. D. P., Bisinotto, R. S., Daetz, R., Risco, C. A., Galvão, K. N., ... and Santos, J. E. P. 2016. Effects of oral calcium supplementation on productive and reproductive performance in Holstein cows. Journal of dairy science, 99(10), 8417-8430.
13- Oetzel, G. R. 1996. Effect of calcium chloride gel treatment in dairy cows on incidence of periparturient diseases. Journal of the American Veterinary Medical Association, 209(5), 958-961.
Oetzel, G. R., and Goff, J. P. 1998. Milk fever (parturient paresis) in cows, ewes, and doe goats. In Current Veterinary Therapy 4: Food Animal Practice. WB Saunders Co..
14- Oetzel, G. R., and Miller, B. E. 2012. Effect of oral calcium bolus supplementation on early-lactation health and milk yield in commercial dairy herds. Journal of Dairy Science, 95(12), 7051-7065.
15- Piccione, G., Messina, V., Marafioti, S., Casella, S., Giannetto, C., and Fazio, F. 2012. Changes of some haematochemical parameters in dairy cows during late gestation, post partum, lactation and dry periods. Vet Med Zoot, 58(1), 59-64.
16- Radostits, O. M., Gay, C. C., Hinchcliff, K. W., and Constable, P. D. (Eds.). 2007. Veterinary Medicine E-Book: A textbook of the diseases of cattle, horses, sheep, pigs and goats. Elsevier Health Sciences.
17- Radostits, O. M., Leslie, K. E., and Fetrow, J. 1994. Herd health: food animal production medicine (No. Ed. 2). WB Saunders company.
18- Reinhardt, T. A., Horst, R. L., and Goff, J. P. 1988. Calcium, phosphorus, and magnesium homeostasis in ruminants. Veterinary Clinics of North America: Food Animal Practice, 4(2), 331-350.
19- Ribeiro, E. S., Lima, F. S., Greco, L. F., Bisinotto, R. S., Monteiro, A. P. A., Favoreto, M., and Santos, J. E. P. 2013. Prevalence of periparturient diseases and effects on fertility of seasonally calving grazing dairy cows supplemented with concentrates. Journal of dairy science, 96(9), 5682-5697.
20- Risco, C. A., Drost, M., Thatcher, W. W., Savio, J., and Thatcher, M. J. 1994. Effects of calving-related disorders on prostaglandin, calcium, ovarian activity and uterine involution in postrartum dairy cows. Theriogenology, 42(1), 183-203.
SAS Institute, )2003(. SAS User’s Guide. Version 9.1 Ed. SAS Inst. Inc., Cary, NC.
21- Seifi, H. A., LeBlanc, S. J., Leslie, K. E., & Duffield, T. F. 2011. Metabolic predictors of post-partum disease and culling risk in dairy cattle. The Veterinary Journal, 188(2), 216-220.
22- Wilhelm, A. L., Maquivar, M. G., Bas, S., Brick, T. A., Weiss, W. P., Bothe, H., ... & Schuenemann, G. M. 2017. Effect of serum calcium status at calving on survival, health, and performance of postpartum Holstein cows and calves under certified organic management. Journal of dairy science, 100(4), 3059-3067.
23- Whiteford, L. C., & Sheldon, I. M. 2005. Association between clinical hypocalcaemia and postpartum endometritis. The Veterinary Record, 157(7), 202.
