[1. Adams, G.P., Matteri, R.L., Kastelic, J.P., Ko, J.C.H., Ginther, O.J., (1992). Association between surges in follicle-stimulating hormone and emergence of follicular waves in heifers. J. Repro. Fert. 94, 177-188. http://dx.doi.org/10.1530/jrf.0.094017710.1530/jrf.0.0940177]Search in Google Scholar
[2. Armstrong, D.G., Webb, R. (1997). Ovarian follicular dominance: the role of intra-ovarian growth factors and novel proteins. Rev. Repro. 2, 139-146. http://dx.doi.org/10.1530/ror.0.002013910.1530/ror.0.0020139]Search in Google Scholar
[3. Arthur, H. G., Noakes, D.E., Pearson, H. (1989). Veterinary reproduction and obstetrics. Theriogenology, Sixth edition W.B Saunders, Toronto.]Search in Google Scholar
[4. Brown, J. L., Reeves, J. J. (1983). Absence of specific luteinizing hormone releasing hormone receptors in ovine, bovine and porcine ovaries. Biol. Reprod. 29, 1179-1182. http://dx.doi.org/10.1095/biolreprod29.5.1179 PMid:631707110.1095/biolreprod29.5.1179]Search in Google Scholar
[5. Diskin, M.G., Austin, E.J., Roche, J.F. (2002). Exogenous hormonal manipulation of ovarian activity in cattle. Dom. Anim. Endo. 2, 211-228. http://dx.doi.org/10.1016/S0739-7240(02)00158-310.1016/S0739-7240(02)00158-3]Search in Google Scholar
[6. Diskin, M.G., Mackey, D.R., Roche, J.F., Sreenan, J.M. (2003). Effects of nutrition and metabolic status on circulating hormones and ovarian follicle development in cattle. Anim. Repro. Sci. 78, 345-370. http://dx.doi.org/10.1016/S0378-4320(03)00099-X PMid:1281865310.1016/S0378-4320(03)00099-X]Search in Google Scholar
[7. Dovenski T., Kocoski, Lj., Trojacanec, P., Popovski, K., Mickovski, G., Petkov, V., Veselinovic, S., Ivkov, V., Ivancev, N., Ickov, R., Mickov, Lj. (2000). Ultrasound diagnosis of functional ovarian disorders in dairy cows and its adequate treatment. Proceedings Symposium on veterinary clinical pathology and therapy “Clinica Veterinaria”, 35-50. Budva (in Serbian).]Search in Google Scholar
[8. Drackley, J. K., Dann, H. M., Douglas, G. N., Guretzky, N. A. J., Litherland, N. B., Underwood, J. P., Loor, J. J. (2005). Physiological and pathological adaptations in dairy cows that may increase susceptibility to periparturient diseases and disorders. Ital. J. Anim. Sci. 4, 323-344.10.4081/ijas.2005.323]Search in Google Scholar
[9. Gabor, Gy., Kastelic, JP., Pinter, S., Szasz, F., Szigeti, E., Solymosi N. (2002). Improving reproductive performance in lactating dairy cows by synchronizing ovulation or inducing oestrus. Acta Vet. Hung. 50 (2), 231-234. http://dx.doi.org/10.1556/AVet.50.2002.2.1210.1556/avet.50.2002.2.12]Search in Google Scholar
[10. Ginther, O.J., Beg. M.A., Donadeu, F.X., Bergfelt, D.R. (2003). Mechanism of follicle deviation in monoovular farm species. Anim. Reprod. Sci. 78, 239-257. http://dx.doi.org/10.1016/S0378-4320(03)00093-910.1016/S0378-4320(03)00093-9]Search in Google Scholar
[11. Ginther, O.J., Kastelic, J.P., Knopf, L. (1989). Compositions and characteristics of follicular waves during the bovine estrous cycle. Anim. Reprod. Sci. 20, 187-200. http://dx.doi.org/10.1016/0378-4320(89)90084-510.1016/0378-4320(89)90084-5]Search in Google Scholar
[12. Gümen, A., Guenther, J.N, Wiltbank, M.C. (2003). Follicular size and response to ovsynch versus detection of estrus in anovular and ovular lactating dairy cows. J. Dairy Sci. 86, 3184 -3194. http://dx.doi.org/10.3168/jds.S0022-0302(03)73921-610.3168/jds.S0022-0302(03)73921-6]Search in Google Scholar
[13. Hayashi Ken-Go, Motozumi Matsui, Takashi Shimizu, Natsuko Sudo, Ayako Sato, Koumei Shirasuna, Masa Tetsuka, Katsuya Kida, Dieter Schams, Akio Miyamoto. (2008). The absence of corpus luteum formation alters the endocrine profile and affects follicular development during the first follicular wave in cattle. Reproduction 136, 787-797. http://dx.doi.org/10.1530/REP-07-0480 PMid:1871598210.1530/REP-07-0480]Search in Google Scholar
[14. Jolly, P. D., McDougall, S., Fitzpatrick, L. A., Macmillan, K. L., Entwistle, K. W. (1995). Physiological effects of undernutrition on postpartum anoestrus in cows. J. Reprod. Fertil. Suppl. 49, 477-492. PMid:7623336]Search in Google Scholar
[15. Lopez, H., Caraviello, D. Z., Satter, L. D., Fricke, P. M., Wiltbank, M. C. (2005). Relationship between level of milk production and multiple ovulations in lactating dairy cows. J. Dairy Sci. 88, 2783-2793. http://dx.doi.org/10.3168/jds.S0022-0302(05)72958-110.3168/jds.S0022-0302(05)72958-1]Search in Google Scholar
[16. Lopez-Gatius, F., Lopez-Bejar, M., Rutllant, J., Yaniz, J., Santolaria, P. (1999). Persistent follicles in high-producing dairy cows. Proc EETA Annual Meeting, 190 abst., Lyon, France.]Search in Google Scholar
[17. Lopez-Gatius, F., Santolaria, P., Yaniz, J., Ruthant, J., Lopez-Bejar, M. 2001). Persistent ovarian follicles in dairy cows: a therapeutic approach. Theriogenology, 56, 649-659. http://dx.doi.org/10.1016/S0093-691X(01)00596-910.1016/S0093-691X(01)00596-9]Search in Google Scholar
[18. Lucy, M. C., McDougall, S., Nation, D. P. (2004). The use of hormonal treatments to improve the reproductive performance of lactating dairy cows in feedlot or pasture-based management systems. Anim. Reprod. Sci. 82-83, 495-512. http://dx.doi.org/10.1016/j.anireprosci.2004.05.004 PMid:1527147610.1016/j.anireprosci.2004.05.004]Search in Google Scholar
[19. Mansoor, A. R., Taha, M. M., Ahmed, K. D., Majeed, A. F. (2011). Treatment of inactive ovaries in dairy cows. Al-Anbar. J. Vet. Sci., 4, 1.]Search in Google Scholar
[20. Moore, K., Thatcher, W. W. (2006). Major advances associated with reproduction in dairy cattle. J. Dairy Sci. 89, 1254-1266. http://dx.doi.org/10.3168/jds.S0022-0302(06)72194-4 10.3168/jds.S0022-0302(06)72194-4]Search in Google Scholar
[21. Mussard, ML., Burke, CR.,Behlke, EJ., Gasser, CL., Day, ML. (2007). Influence of premature induction of a luteinizing hormone surge with gonadotropinreleasing hormone on ovulation, luteal function, and fertility in cattle. J. Anim. Sci. 85, 937-943. http://dx.doi.org/10.2527/jas.2006-592 PMid:1714596810.2527/jas.2006-59217145968]Search in Google Scholar
[22. Newcomb, R., Christie, W.B., Rowson, L.E.A., Walters, D.E., Bousfield, W.E.D., (1979). Influence of dose, repeated treatment and batch of hormone on ovarian response in heifers treated with PMSG. J Reprod Fertil., 56, 113-118. http://dx.doi.org/10.1530/jrf.0.056011310.1530/jrf.0.0560113469831]Search in Google Scholar
[23. Opsomer, G,. Coryn, M., Deluyker, H., de Kruif, A. (1998). An analysis of ovarian dysfunction in high yielding dairy cows after calving based on progesterone profi les. Reprod Domest Anim., 33. http://dx.doi.org/10.1111/j.1439-0531.1998.tb01342.x10.1111/j.1439-0531.1998.tb01342.x]Search in Google Scholar
[24. Opsomer, G., Mijten, P., Coryn M., de Kruif, A. (1996). Post-partum anoestrus in dairy cows: a review. Vet Quart., 18, 68-75. http://dx.doi.org/10.1080/01652176.1996.9694620 PMid:879259910.1080/01652176.1996.96946208792599]Search in Google Scholar
[25. Opsomer G.(2013). High yielding dairy cows: to produce or to reproduce and what practitioners should know about this to help their clients. Mac Vet Rev; 36 (2): 53-62.]Search in Google Scholar
[26. Popovski, K., Kanchev, Lj. (1998). Endocrinology of reproduction. First Ed. Veterinaren institut i Veterinaren fakultet, Skopje]Search in Google Scholar
[27. Pulley, S.L., Wallace, L.D., Mellieon, H. I. Jr., Stevenson, J.S. (2013). Ovarian characteristics, serum concentrations of progesterone and estradiol, and fertility in lactating dairy cows in response to equine chorionic gonadotropin. Theriogenology 79, 127-134. http://dx.doi.org/10.1016/j.theriogenology.2012.09.017 PMid:2313146610.1016/j.theriogenology.2012.09.01723131466]Search in Google Scholar
[28. Rhodes, F. M., McDougall, S., Burke, C. R., Verkerk, G. A., Macmillan, K. L. (2003). Treatment of cows with an extended postpartum anestrous interval. J. Dairy Sci. 86, 1876-1894. http://dx.doi.org/10.3168/jds.S0022-0302(03)73775-810.3168/jds.S0022-0302(03)73775-8]Search in Google Scholar
[29. Ryan, M, Mihm, M, Roche, J.F. (1998). Effect of GnRH given before or after dominance on gonadotrophin response and the fate of that follicle wave in postpartum dairy cows. J. Reprod. Fertil. Abstr Ser, 21, 61.]Search in Google Scholar
[30. Santos, J.E.P., Rutigliano, H.M., Sá Filho, M.F. (2009). Risk factors for resumption of postpartum cyclicity and embryonic survival in lactating dairy cows. Anim. Reprod. Sci. 110, 207-221. http://dx.doi.org/10.1016/j.anireprosci.2008.01.014 PMid:1829598610.1016/j.anireprosci.2008.01.014]Search in Google Scholar
[31. Santos, JEP. (2011). Nutritional management of lactating dairy cows, dairy production medicine. John Wiley & Sons, Inc., Ames, IO, USA]Search in Google Scholar
[32. Smith, M.F., Perry, G.A., Atkins, J.A., Jinks, E.M., Pohler, K.G., Patterson, D.J. (2010). Physiological principles underlying synchronization of estrus. Appl. Reprod. Strat. Conf. Proc. August 5 & 6 Nashville, TN, USA]Search in Google Scholar
[33. Townson, D.H., Tsang, P.C., Butler, W.R., Frajbla, M., Griel, L.C. Jr., Johnson, C.J., Milvae, R.A., Niksic, G.M., Pate, J.L. (2002). Relationship of fertility to ovarian follicular waves before breeding in dairy cows. J Anim. Sci. 80, 1053-1058. PMid:1200866010.2527/2002.8041053x]Search in Google Scholar
[34. Wiltbank, M.C., Gumen, A., Sartori, R. (2002). Physiological classification of anovulatory conditions in cattle. Theriogenology 57, 21-52. http://dx.doi.org/10.1016/S0093-691X(01)00656-210.1016/S0093-691X(01)00656-2]Search in Google Scholar
[35. Xu, Z.Z., Garverick, H.A., Smith, G.W., Smith, M.E., Hamilton, S.A., Youngquist, R.S., (1995). Expression of follicle stimulating hormone and luteinizing hormone receptor messenger ribonucleic acids in bovine follicles during the first follicular wave. Biol. Reprod., 52, 464-469.]Search in Google Scholar
[36. Zdunczyk, S., Mwaanga, E.S., Tepicht, M.J., Baranski, W., Janowski, T. (2002). - Plasma progesterone levels and clinical findings in dairy cows with post-partum anoestrus. Bull.Vet.Inst. Pulawy 46, 79-86. ]Search in Google Scholar