Document Type : Original Article


1 M.Sc. student of animal physiology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

2 Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran


This study investigated the effect of dietary supplementation with calcium salts of fatty acids using 48 Afshari ewes randomly allocated to four treatments. All groups used in flushing period and only the source of energy were different between rations. The ewes were divided into four groups: A-barely grain; group B-received 5% of CSFA with source of flaxseed oil (w3); group C-received 5% of CSFA with source of sun flower oil (w6) and group D-control (only received basal diet) . Treatments A, B and C improved fertility and lambing rates. Treatment C with 18 and control with 10 lambs represented the highest and the lowest number of progeny respectively. Our results indicate that using CSFA with different profiles increase metabolite levels related to reproductive. In conclusion, using CSFA supplementation in flushing period was effective on reproductive performance of Iranian Afshari ewes


Abdelatif, A.M., Elnazeeb, M.E., Makawi, S.E.A. and Fadlalla, A.M., 2009.Blood constituents incycling, gestating and lactating desert ewes (Ovisaries) in relation to dietary supplementation. Global Veterinaria, 3, 248–259.
Downing JA, Joss J and Scaramuzzi RJ, 1995. Ovulation rate and the concentrations of gonadotrophins and metabolic hormones in ewes infused with glucose during the late luteal phase of the oestrous cycle. J Endocrinol 146: 403-410.
Hawkins, D.E., Niswender, K.D., Oss, G.M., Moeller, CL., Odee, K.G., Sawyer, H.R., Niswender, G.D., 1995. An increase in serum lipids increases luteal lipid content and alters the disappearance rate of progesterone in cows. J. Anim. Sci. 73, 541-545.
Hess BW, Lake SL, Scholljegerdes EJ, Weston TR, Nayigihugu V, Molle JDC and Moss GE, 2005. Nutritional control of beef cow reproduction. J AnimSci 83: 90-106.
Ishida, N.; Okada, M.; Sebata, K.; Miato, M.; Fukui, Y., 1999: Effects of GnRH and HCG treatments for enhancing corpus luteum function to increase lambing rate of ewes artificially inseminated during the non breeding season. Journal of Reproduction and Development 45, 73–79.
Liel A. Z. A., Abd El-RahmanH. M. A., and El-Nour H. H. M. 2010 “Laparoscopic examination of ovarian activity and some metabolic changes in ewes supplemented with protected fat and growth hormone during estrous cycle,” Egyptian Journal of Basic and Applied Physiology, vol.9, pp. 307–323,.
Naqvi, S.M.K., Sejian, V. and Karim, S.A., 2012. Effect of feed flushing during summer season on growth, reproductive performance and blood metabolites in Malpura ewes under semiarid tropical environment.Tropical Animal Health and Production,DOI 10.1007/s11250-012-0185-2.
Naqvi, S.M.K., Soren, N.M. and Karim, S.A., 2011. Effect of concentrate supplementation on performance, ovarian response, and some biochemical profile of Malpura ewes. Tropical Animal Health and Production, 43, 905-913.
Rabiee AR, Lean IJ, Gooden JM and Miller BG, 1999. Relationships among metabolites influencing ovarian function in the dairy cow. J Dairy Sci 82: 39-44.
Rabiee AR and Lean IJ, 2000. Uptake of glucose and cholesterol by the ovary of sheep and cattle and the influence of arterial LH concentrations. AnimReprodSci 64: 199-209.
Thomas MG and Williams GL, 1996. Metabolic hormone secretion and FSH-induced superovulatory responses of beef heifers fed dietary fat supplements containing predominantly saturated or polyunsaturated fatty acids. Theriogenology 45: 451-458.
Wonnacott, K.E.; Kwong, W.Y.; Hughes, J.; Salter, A.M.; Lea, R.G.; Garnsworthy, P.C. & Sinclair, K.D. (2010). Dietary omega-3 and -6 polyunsaturated fatty acids affect the composition and development of sheep granulosa cells, oocytes and embryos. Reproduction, Vol.139, No.1
(January 2010), pp. 57-69. ISSN 1470-1626.
ZareShahneh, A.; Mohammadi, Z.; Azeli, F.; Moradi, H.; Share babak, M.; Dirandeh, E., 2008:
The effect of GnRH injection on plasma progesterone concentration conception rata and ovulation rate in Iranian Holstein cows. Journal Animal and Veterinary Advances 7, 1137–1141.
Zeron Y, Sklan D, Arav A. 2002. Effect of polyunsaturated fatty acid supplementation on biophysical parameters and chilling sensitivity of ewe oocytes. MolReprodDev; 61:271–278.