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Aspectos Biológicos y Productivos de la Pubertad de la Hembra Bovina (página 4)


Partes: 1, 2, 3, 4

  1. French L.R. and B. Spenneta. (1981). Effects of antibodies to progesterone on reproduction of ewes. Theriogenology 16: 407.
  2. Ganong W.F. (1971). Manual de fisiología médica 3ra. Ed. El Man. Mod. S.A. México. p.358.
  3. Garverick H.A., Elmore R.G., Vaillancourt D.H., and Sharp A.J. (1980). Ovarian response to gonadotropin-releasing hormone in postpartum dairy cows. Am. J. Vet. Res. 41: 1582.
  4. Gasser, C. L.; Grum, D. E.; Mussard, M. L.; Fluharty, F. L.; Kinder, J. E. and Day, M. L. (2006). Induction of precocious puberty in heifers I: Enhanced secretion of luteinizing hormone 10.2527/jas.2005-636. J. Anim Sci. 84(8): 2035.
  5. Gasser, C. L.; Burke, C. R.; Mussard, M. L.; Behlke, E. J.; Grum, D. E.; Kinder, J. E. and Day, M. L. (2006). Induction of precocious puberty in heifers II: Advanced ovarian follicular development 10.2527/jas.2005-637. J. Anim Sci. 84(8): 2042.
  6. Gasser, C. L.; Bridges, G. A.; Mussard, M. L.; Grum, D. E.; Kinder, J. E. and Day, M. L. (2006). Induction of precocious puberty in heifers III: Hastened reduction of estradiol negative feedback on secretion of luteinizing hormone 10.2527/jas.2005-638. J. Anim Sci. 84(8): 2050.
  7. Gil A., García J., González J., Fernández O., Rizo J.M. (1981). Terapia comparativa entre el factor liberador gonadotrópico, asociado con estrgenos y la gonadotropina sérica contra el anestro de la hembra bovina. Rev. Salus Anim. 3: 187.
  8. Gil F.A. (1984). Diagnóstico clínico y tratamiento hormonal del anestro en vacas y novillas. Tesis C.Dr. Cienc. CENSA. La Habana.
  9. Gil Figueredo C, Faure R. (1989). Aumento de la tasa de concepción mediante la inyección de Cloprostenol en estros inducidos con progesterona y estradiol en vacas y novillas Cebú. Rev. Salud Anim. 2: 173-78
  10. Glencross R.G. (1984). A note on the concentrations of plasma oestradiol-17b and progesterone around the time of puberty in heifers. Anim. Prod. 39: 137.
  11. Glencross R.G. (1985). Induction of follicular growth and oestradiol secretion in cattle by pulsatile infusion of GnRH during periods of high plasma progesterone concentration. Final report 1984-5 National Instituye for Research in Dairying Reading, U.K.: p. 112.
  12. Goldbeck V. (1976). Verbesserung der Erstbesa mung sergelomisse bei rinder durch gonadotropin-releasing-hormone (GnRH) Inaugural-Dissertation zur Erlangung des Grades eines Doctor Medicinae Veterinariae durch die tierarztliche Hochschule Hannover. Hannover.
  13. Gombe S. and Hansel W. (1973). Plasma luteinizing hormone (LH) and progesterone levels in heifer on restricted energy intakes. J. Anim. Sci. 37: 728.
  14. González Menció F., Gil A., Fernández O. y Faure R. (1980). Respuesta a la administración de hormonas liberadoras de gonadotropinas (GnRH) en vacas lecheras con anestro postparto prolongado. Rev. Salud Anim. 2: 151.
  15. González Noelia, C. Geerken, R. Pedroso y L. Lavandeira, (1986). Efecto de la suplementación mineral en la presentación de celo de novillas. Resum. 5ta. Reun. ACPA. La Habana.
  16. González Stagnaro C. (1993). Cap. VIII Fisiología reproductiva en vacas mestizas de doble propósito En: Ganadería mestiza de doble propósito. Editor C.González- Stagnaro. 1ra. edic. Astro Deta S.A. Maracaibo. Venezuela.
  17. González, Noelia y Pedroso, R. (1979). Niveles de algunos componentes sanguíneos en novillas y su relación con la presentación estral. Rev. Cub. Reprod. Anim. 5: 21.
  18. González, Noelia; Guerkeen, C.; Pedroso, R. y Lavandeira, L.E. (1981a). Niveles de macroelementos en el suero sanguíneo de novillas mestizas (HxC) con diferentes estados reproductivos. II Sem. Científico CENSA. Resúmenes p. 149.
  19. González, Noelia; Guerkeen, C.; Pedroso, R. y Lavandeira, L.E. (1981b). Desbalances de minerales en rebaños de novillas F2 (BsxC) estabuladas durante la estación seca. Resúmenes II Sem. Científico CENSA p. 151.
  20. González, Noelia; Guerkeen, C.; Pedroso, R. y Lavandeira, L.E. (1981c). Niveles de microelementos en el suero sanguíneo de novillas mestizas (HxC) con diferentes estados reproductivos. Resúmenes II Sem. Científico CENSA p. 152.
  21. González-Menció F., J. Manns and B.D. Murphy. (1978). FSH and LH activity of PMSG from mares at different stages of gestation. Anim. Reprod. Sci.1: 137.
  22. González-Padilla E., G.F. Niswender and J.N. Wiltbank (1875b). Puberty in beef heifers. II Effect of injections of progesterone and estradiol- 1717b on serum LH, FSH and ovarian activity. J. Anim. Sci. 40: 1105.
  23. González-Padilla E., J.N. Wiltbank and G.N. Niswender (1975a). Puberty in Beef Heifers. Y. the interrelationship b etween pituitary, hypothalamic and ovarian hormones. J. Anim. Sci. 40: 1091.
  24. González-Padilla E., R. Ruíz, D. LeFever, A. Fenham and J.N. Wiltbank. (1975c). Pu . berty in beef heifer. III Induction of fertile estrus J. Anim. Sci. 40: 1110.
  25. Gonzalez-Stagnaro C. (1995). Manejo reproductivo en las novillas mestizas de reemplazo. En Manejo de la ganadería mestiza de doble propósito. Ninoska Madrid-Bury y E. Soto Belloso. Univ del Zulia. Ed Astro Data S.A. Maracaibo, Venezuela.
  26. Gosling J.O., Mairead Ryan, Patricia Morgan. (1979). Comls hormone-induced loss of gonadotrophin receptors reduce the efficiency of superovulations stimulated by PMSG. Ann. Biol. Anim. Bioch. Biophys. 19: 1499.
  27. Greer R.C. (1984). Effect of daylenght at birth and lunar phase on the occurrenceof first oestrus in beef heifers. Anim. Prod. 39: 59.
  28. Gwazdauskas F.C. (1985). Effects of climate on reproduction in cattle. J. Dairy Sci. 68: 1568.
  29. Hafez E.S.E. and M.R. Jainudeen. (1974). Reproductive failure in females. En: Reproduction in farm animals. E.S.E Hafez (ed).3th. Ed. Lea and Febiger. Philadelphia.
  30. Hall J.B., Staigmiller R.B., Bellows R.A., et al. (1995). Body composition and metabolic profiles associated with puberty in beef heifers. J. Anim. Sci. 73:3409.
  31. Hall J.B., Staigmiller R.B., Short R.E. et al (1997). Effect of age and pattern of gain on induction of puberty with a progestin in beef heifers. J. Anim. Sci. 75:1606.
  32. Hall JB, Schillo KK, Fitzgerals BP, et al. (1994). Effects of recombinant bovine somatotropin and dietary energy intaje on growth secretion of luteinizing hormone, follicular development, and onset of puberty in beef heifers. J. Anim. Sci. 72: 709.
  33. Hammond J. (1927). The physiology of reproduction in the cow, Cambridge, Univ. Press.
  34. Hanrahan J.P., Quirke J.F., Roche J.F., (1985). Melatonin and the onser of the breeding season in ewes. ABA 1985, 53: 5827 abstr.
  35. Hansel, W., R.J. Schechter, P.V. Malven, K.R. Simmons D.L. Black, A. J. Hackett and R.R. Saatman. (1975). Plasma hormone levels in G.methyl-17-acetoxy progesterone and estradiol benxoate treated heifers. J. Anim. Sci. 40, 671.
  36. Hansen P.J. (1985). Seasonal modulation of puberty and the post-partum anestrus in cattle: a review. Livestock production Sci. 12: 309.
  37. Hansen P.J. (1985). Seasonal Modulation of puberty and the postpartum anestrus in cattle: A Review. Livestock Prod. Sci. 12:309.
  38. Hansen P.J., Kamwanja L. A., Hauser E.R. (1983). Photoperiod influences age at puberty of heifers J. Anim. Sci. 57: 985.
  39. Hawk H.W., W.J. Tyler and L.E. Casida. (1954). Some factors affecting age at puberty in Holstein. Friesian heifers. J. Dairy Sci. 37: 252.
  40. Hay F. Maru, R.M. Moor, D.G. Gran and H.M. Dott. (1979). Regeneration of atretic sheep ovarian follicles in vitro. J. Reprod. Fert. 55, 195.
  41. Henricks D.M. and Mayer D.T. (1977). Gonadal hormones and uterine factors. En: Reproduction in domestic animals. Cole H.H. and Cupps. P.T., 3 th. ed. Academic Press. New York.
  42. Herbert J. and M.R. Trimble. (1967). Effect of oestradiol and testosterone on the sexual receptivii and attractiveness of the female rhesus monkey. Nature 216: 165.
  43. Hillier G.S., Groom V.G., Boyns R.A., Cameron D.H.E. (1974). Development of polycistic ovaries in rats actively immunised against T-3-BSA. Nature 250: 433.
  44. Hixon J.E., W. Hansel. (1979). Effects ofprostaglandin F2a estradiol and luteinizing hormone in dispersed cell preparation of bovine corpora lutea. Adv. Exp. Med. Biol. 112: 613.
  45. Hoffman P.C., Brehm NM; Price SG. (1996). Effect of accelerated post pubertal growth and early calving on lactation perfomance of primiparous Holstein heifers. J. of. Dairy Sci. 70: 2024.
  46. Hohson H.D. and Ragsdale A.C. (1959). Effects of constant environmental temperatures of 50º for growth responses of Holstein, Brown Swiss and Jersey calves, Miss. Agr. Exo. Sta. Res. Bull. 705.
  47. Hóly L. and Hrivnak J. (1965). Influences of low closes of oestrogen on libido, vaginal cell picture and crystallization pattern in cervical mucus of spayed cows. Vet. Med. , Praha 10: 119.
  48. Holý L. y G. Martínez. (1970). Biología de la reproducción bovina. 1ra. edic. p. 45. Ed. Rev., Inst. Cub. Libro, La Habana.
  49. Hruska K., Fránek M., Bursa J., Kaláb P. (1983). Radioinmmunoassay of progesterone in cow. Endocrinologia Experimentalis 17: 213.
  50. Humphrey K.W. (1968). The effects of oestradiol-3, 17b on tubal transport in the laboratory mouse. J. Endocr. 42: 17.
  51. IAEA. (1984). Laboratory training manual on radioimmunoassay in animal reproduction. Techn. Rep. Ser. 233 p.73.
  52. Imakawa K., Day M.L., García-Winder M., Zalesky D.D., Kittok R.J., Kinder J.E. (1983).Endocrine changes during restoration of estrous cycles following nutritionally induced anestrus in heifers. In. Proc. Fifth World Conf. Anim. Prod. Japan. Soc. Zootech. Sci. August. 14-19. p.225.
  53. Imakawa K., R.J. Kittok and J. E. Kinder (1984). Luteinizing hormone secretion after withdrawal of exogenous progestogen in heifers fed three levels of dictary energy. J. Anim. Sci. 58: 151.
  54. Imakawa, K. (1985). Influence of dietary energy on endocrine mechanisms controlling reproductibe functions in the bovine female. Diss. Abstr. Int., B (Sci. and Enginer.) 45: 3731.
  55. Jiménez J., A.O. Torres y Alba J.O. (1986). Valoración de un esquema de tratamiento hormonal para la inducción del celo en vacas aciclícas, usando progesterona y gonadotropina seríca. Resum. 5ta. Reun. ACPA. La Habana.
  56. Johsson, I.D. and J.M. Obst. (1978).Pheripheral plasma LH levels inprepuberal heifers. Proc. 10th Ann. conf. Austr. Soc. Reprod. Biol., Sidney, August 30-31, Sept. 1: 89.
  57. Jung. J.K., Kiracofe G.H. (1985). Effect of body weight on conception in beef heifers. In Proc. 3ra. AAAP Anim. Sci. Congr., May 6-10, 1985, Vol 1, Seoul, Korea; The Organ Comm. p. 469.
  58. Kahwanago, I., W.L.R. Heinrichs, W.L. Herrmann. (1969). Isolation of oestradiol "Receptors" form bovine hypothalamus and anterior pituitary gland. Nature, 223: 313.
  59. Kallas H. (1929). Puberte precore par parabiose CR Soc. Biol. 100: 979
  60. Kaltenbach c.c. and Dunn T.G. (1980). Endocrinology of reproduction. En: Reproduction in farm animals. 4ta. ed. Hafez E.S.E. Lea an Febiger, Philadelphia.
  61. Kamwanja, L. A. (1984). Regulation of onset of puberty in the bovine female: the rol of season. Diss. Abst. Int. B. (Sci. and Engin) 45: 1332.
  62. Kannaway D.J., Gilmore T.A., Dunstan E.A. (1985). Pinealectomy delays puberty in ewe lambs. J. Reprod. Fertil.74: 119.
  63. Kinder J.E., Imakawa K., Day M.L., Kittot R.J. (1982). Reproductive hormone secretion in beed heifers. I. In beef cattle report. 1982. Univ. Nebraska 19-20.
  64. Kinder J.E., Imakawa R., Day M.L., Kittot R.J. (1982a). Reproductive hormone secretion in beed heifers II. In Beef cattle report, 1982. Univ. Nebraska 21-22.
  65. Kinder JE, Day ML, Kittok RJ. (1987). Endocrine regulation of puberty in cows and . ewes . J. Reprod. Fertil. 34 (Suppl.): 167.
  66. Kiser T.F., J.H. Britt and H.D. Richie. (1977). Testosterone treatment of cows for use in detection of estrus. J. Anim. Sci. 44: 1030.
  67. La Voi V.A., M.W. Hull and E.L. Moody, (1971). Progesterone ratios in heifers at estrus. J. Anim. Sci. 33(1) a 244 abstr.
  68. Lalman D.L., Petersen M.K., Asotegui R.P. et al. (1993). The effects of ruminally undergradable protein, propionic acid, and monensin on puberty and pregnancy in beef heifers. J. Anim. Sci. 71:2843.
  69. Lam R.F. (1986), Contribución al estudio de los principales indicadores sanguíneos del metabolismo proteico y enérgetico de hembras bovinas en desarrollo. Tesis C. Dr. Ciencias. ISCAH-MES. La Habana.
  70. Larson C.L., Miller H.L., Marshall D.M., et al. (1993). effects of administering progesterone and GnRH on age at puberty in crossbred beef heifers. South Dakota beef report No.93-10:40.
  71. Larson R.L., Corah L.R., Spire M.F., et al. (1995). Effect of treatment with ivermectin on reproductive performance of yearling beef heifers. Theriogenology 44:189.
  72. Leavitt W.W., Okulics W.C., McCracken J.A., Schramm W., Robidoux W.F. Jr. (1985). Rapid recovery of nuclear estrogen receptor and oxitocin in the ovine uterus followiun progesterone withdrawal. J. of steroid Biochemistry 22: 687.
  73. Lee C.N., D.L. Cook, J.R. Parfet, C.A. Smith, and H.A. Garverick, (1986). Administration of progesterone at anset of estrus caused the preovullatory follicle to persist. J. Dairy Sci. 69 (Suppl.1) p14 (Abstr).
  74. Lee K.S., Na K.J., Kim H.S. (1984). _Studies on growth and puberty in korean native and Korean native x charolais heiferss. Research reports of the Office of Rural Development, Suweonn (Livestock and Veterinary) 26:1
  75. Legan S.J., I´Anson H. Fitzgerald B.P., Fitzovich D. (1985). Does the seasonal increase in estradiol negative feedback prevent luteinizing hormone surges in anestrous ewes by suppresing hypothalamic gonodotropin releasing hormone pulse frequency. Biology Reprod. 33:117.
  76. Lemon Meredith. (1975). The effect of oestrogens alone or in association with progestagens on the formation and regression of the corpus luteum of the cyclic cow. Ann. Biol Anim. Bioch. Biophys. 15: 243.
  77. Leung K., V. Padmanablhan, L.J. Spicer, H.A. Tucker, R.E., Short, E.M. Convey. (1986) Relationship between pituitary GnRH bibnding sites and pituitary release of gonadotrophins in post-partum beef cows. J. Reprod. Fert. 76:53.
  78. Lindsay D.R., Pelletier J., Pisselet C., Courot M. (1984). Changes in photoperiodd and nutrition and their effect on testicular growth of rams. J. Reprod. Fert. 71:351.
  79. Louw B.P., Lishman A.W., Nieker A.V. and Lesch S.F. (1983). The influence of season on tonic luteinizing hormone (LH) and porgesterone levels in cattle in a subtropical en viroment. South Afric. J. Anim. Sci. 13:253.
  80. Ma Y.J., Ojeda S.R. (1997). Neuroendocrine control,of female puberty: glial and neuronal interactions. J. Investig. Dermatol. Symp. Proc. 2:19.
  81. Maciel, M. N., D. A. Zieba, et al. (2004). Chronic administration of recombinant ovine leptin in growing beef heifers: Effects on secretion of LH, metabolic hormones, and timing of puberty. J. Anim Sci. 82(10): 2930.
  82. Maciel, M. N., D. A. Zieba, et al. (2004). Leptin Prevents Fasting-Mediated Reductions in Pulsatile Secretion of Luteinizing Hormone and Enhances Its Gonadotropin-Releasing Hormone-Mediated Release in Heifers. Biol Reprod 70(1): 229.
  83. Madet, A., B. Baqrcikowski, R. Stupnicki, Ewea Kula and Z. Binienda. (1980). Luteinizing hormone response to injection of synthetic gonodatrophin releasinf hormone of infusion of oestradiool – 17 Beta ibn heifers. Anim. Repdoc. Sci. 3:17.
  84. Manns J.G., G.D. Niswender and T. Braden (1984). FSH receptors in the bovine corpus luteum, Theriogenology 22:321.
  85. Márquez B.G.A., Pineda F.M.P., Cardoso A.V.M., De Lucas T.J. y Pijoan A.P. (1985). Inducción de la actividad sexual en ovejas corriedale mediante administración de melatonina y la variación del fotoperíodo. Reunión de Investigación Pecuaria en México. (1985). P 210.
  86. Martensz N.D., D.T. Baird, R.J. Scaramuzzi and P.F.A. Van Look. (1976). Androstenedione and the control of luteinizing hormone in the ewe during aanoestrus. J. Endocr. 69:227.
  87. Martín LC, Brinks JS, Bourdon RM et al. (1992). Genetic Effects. on Beef Heifer. Puberty and Subsequent Reproduction. J. Anim Sci. 70: 4006.
  88. Matsuo H., A. Arimura, R.M.G. Nair and A. V. Schally. (1971). Synthesis of thew porcine Lh and FSH releasing hormone by the solid phase method. Bichem Biophys, _Res. Comm, 45:822.
  89. Mawhinney S. and Roche J.F. (1980). Induction of ovarian activity in beef suckler cows using progesterone and oestradiol benzoate or gonadotrophin releasing hormone. Anim. Breed. Abstr. 48:3704 abstr.
  90. Mayar M.Q., Gladys K. Ternavsky and J.J. Reeves. (1978). Pitvitary responsive ness following infusion or repeated injections of (D-Leu6, des Gly – Nh210) LHRH – ethylamide in prepubertal ewes. J. Anim. Sci. 47:235.
  91. Mc Leod B.J., Peters A.R., Hartesing W. , Lamming G.E. (1985). Plasma LH and FSH responses and ovarian activity in prepubertal heifers treated with repetead injections of low doses of _GnRH for 72 h. J. Reprod. Fert. 74:589
  92. Mc Leod B.J., W. Haresign, A.R. Peters and G-.E: Lamming. (1984). Plasma LH and FSH concentrations in prepubertal beef heifers before and in response to repeated injections of low doses GnRH. J. Reprod. Fert. 70:137.
  93. Mc Donald L.E. (1975). Veterinary endocrinology and reproduction. 2nd ed., Lea and Febiger, Philadelphia.
  94. Mendel V.E., Morrison S.R., Bond T.E. and Lofgreen G.P. (1971). Duration of heat exposure and performance of beef cattle. J. Anim. Sci. 33:850.
  95. Mezzadra C., Homse A., Sampedro D., et al. (1993). Pubertal traits and seasonal variation of the sexual activity in Brahman, Hereford and crossbred heifers. Theriogenology 40:987.
  96. Milvae R.A., W. Hansel (1980). The effects of prostaciclyn (PGI2) and 6-keto-PGF1alfa on bovine plasma progesterone and LH concentrations. Protaglandins 20:641.
  97. Morales, J., Perón, N. Menéndez, A. Iglesias C. (1977). Desarrollo reproductivo en novillas 3/4 cebú – 1/4 Holstein. Características reproductivas en ganado en reproducción. Rev. Cubana Reprod. Animal 3:37.
  98. Murphy BD y Pescador N. (1996). Biología celular de la foliculogénesis bovina. IIo Simposio Internacional de Reproducción Animal. Carlos Paz – Cordoba, Argentina.
  99. Mori, T. (1975). Steroid hormone formation in biovine ovarian follicles. Endocrinol. Japon. 22:361.
  100. Morrow, D.A., L.V. Swanson, H.D. Hafs. (1976). Estrous behavieur and ovarian activity in peripuberal heifers,. Theriogenology 6:427
  101. Morrow, D.A: (1969). Estrous behavior and ovarian activity in prepubertal and postpubertal dairy heifers. J. Dairuy Sci,. 52:224.
  102. Moseley W.M., Dun T.G., Kaltenbanch C.C:, Short r.E., -Staigmiller R.B. (1984). Nagative fee dback control of luteinizing hormone secretion in prepubertal beef heifers at 60 and 200 days of age. J. Anim. Sci, 58:145.
  103. Motoroga V, Gavan C. (1994). The puberty in heifers an important element in determination of efficiency in reproduction. Lucrari stiintifice (Romania): 339
  104. Moudgal N.R., Vidyashankar N. (1984). _Studies on follicle – stimulating hormone receptor induction in the intact inmature rat. Hormone receptors in growrth and reproduction New York, USA, Raven Press 227-236 Vol.9.
  105. Muñoz María Cristina y M, Cisse. (1983). Morfopatología del aborto bovino. I.Babesiosis cerebral en fetos. Rev. Salud Anim. 5:325.
  106. Muss, G.E., J.R. Parfet, C.A. Marvin, R.D. Allrich and M.A. Diekman. (1985). Pitvitary concentrations of gonadotrophins and receptors for GnRH in suckled beef cows at various intervals after calving J.Anim. Sci. 60:1, 285.
  107. Nakada, K.; M. M., T. Nakao, G. Watanabe and K. Taya (2000). Changes in concentrations of plasma immunoreactive follicle-stimulating hormone, luteinizing hormone, estradiol-17ß, testosterone, progesterone, and inhibin in heifers from birth to puberty. Domestic Animal Endocrinology 18: 57.
  108. Nancarrow C.D., Radford H.M. (1976). Response in ovariectomized cows to repeated injections of thyrotrophin releasin hormone (TRH) and to estradiol benzoate (OBD). Theriogenology 6: 642. Abstr.
  109. Niezen J.H., Grieve D.G., McBride B.W., ewt al. (1996). Effect of plane of nutrition before and after 200 Kg of body weight on mammary development of prepubertal Holstein heifers. J. Dairy Sci. 79:1255.
  110. Niswender G.D., Reichert L.E., Midgley A.R. y Nalbandov A.V. (1969). Radioinmunoassay for bovine and ovine luteinizing hormone. Endocrinology 84:1166.
  111. Niswender G.D., T.M. Nett and A.M. Akbar. (1974). The hormones of reproduction. ER: Reproduction in farm Animal. E.S.E, Hafez. 3th. Ed. Lea and Febiger. Philadelphia.
  112. Nuñez, D., Mirva, V. y Montes, I. (1977), Desarrollo reproductivo en novillas 3/4 Cebú – 1/4 Holstein. Características anatomicas del aparato reproductor. Rev. Cub. Reprod. Anim,. 3:47.
  113. Ojeda, S.R., Ma Y.J., Rage F. (1997). The transforming growth factor alpha gene family is involved in the neuroendocrine control of mammalian puberty. Mol Psychiatry 2:355.
  114. Okano A., Terada T. Obata T. (1980a). Histological studies on uterine growth from birth to puberty in Japanese Black heifers. Japan. J. Anim. Reprod. 26:183.
  115. Okano A., Terada T. Obata T. (1980b). Grouth pattern of the genitalia from birth to puberty in Japanese Black heifers. Japan. J. Anim. Reprod. 26:178.
  116. Olujohungbe A., Glencross R.G. (1985). Direct addition radioimmunoassay of progesterone in plasma of prepubertal heifers. Final report 1984-5 National Institute for research in Dairying. Reading UK (1985): 113.
  117. Onuma H., J. Hahn and R.H. Foote, (1970). Factors affecting superovulation, fertilization and recovery of superovulated ova in prepubertal cattle. J. Reprod. Fert. 21: 119.
  118. Owens F.N., Dubeski P., Hanson C.F (1993). Factors that alter the growth and development of ruminants. J. Anim. Sci. 71:3130.
  119. Oxender W. D., H.D. Hafs and E.M. Convey. (1971b). Fetal pituitary GH, LH and prolactin. J.Anim. Sci. 33(1): 260 abstr.
  120. Paterson, A.M. and D.R. Lindsay. (1981). Induction of puberty in gitts. 2. The effect of boars on maintenance of cyclic activity in gilts induced to ovulate with pregnant mare´s serum gonado trophin and human chorionic gonadotrophin. Anim. Prod. 32:51.
  121. Patterson DJ, Corah LR, Brethour JR. et al. (1992a). Evaluation of Reproductive Traits in Bos teurus and Bos indicus Crossbred Heifers: Relationship of Age at Puberty to Length of the Postpartum Interval to Estrus. J. Anim. Sci. 70: 1994.
  122. Patterson DJ, Perry RC, Kiracofe GH, et al. (1992). Manegement Considerations in Heifer Development and Puberty. J. Anim Sci. 70: 4018.
  123. Pavel S. (1971). Evidence for the ependymal origin of arginine vasotocin in the bovine pineal gland. Endocrinology 89: 613.
  124. Pelletier J. and. J. Thimonier (1975). Interactions between ovarian steroids or progestagens and LH release. Ann. Biol. Anim. Bioch. Biophys. 15: 131.
  125. Pelletier J., Carrez. Camous S., Thiery J.C. (1981). Basic. neuroendocrine events before puberty in cattle, sheep and pigs. J. Reprod. Fert. Supple. 30: 91-102.
  126. Pelletier J., Thimonier J. (1969). Etude de la decharge ovulante par dosage radioimmunologique de la LH plasmatique chez la brebis normale ou traitee par un progestagene. C.R. Acad. Sc. Paris, 268: 573.
  127. Pérez Arelys y J. Ramirez. (1986). Respuesta de novillas estabuladas a la suplementación con harina de soya o pienso en el período de seca. Resum 5ta. Reun. ACPA. La Habana.
  128. Perón N., Tarrero R. (1982). Efecto de un regimen de subalimentación durante el crecimiento para novillas lecheras en la edad y peso a la pubertad. Rev. Cub. Reprod. Anim. 8:33.
  129. Perón, N., Martínez G., Iglesias, C. y Morales J.R. (1976). Efecto de la suplementación de minerales, vitaminas y proteína en lapresentación del estro en novillas alimentadas a base de caña molida y miel/urea Rev. Cub. Reprod. Anim. 2: 82.
  130. Peter A.R. (1984). Effect of exogenous oestradiol-17b on gonadotrophin Secretion in post-partum beef cows. J. Reprod. Fert. 72:473.
  131. Peter A.R., Lamning, G.E. (1986). The effect of epostane (Win 32739) an inhibitor of 3b hidroxy steroind de hydrogenase on luteal fanction and gonadotrophin secretion in cows. Anim. Reprod. Sci. 10:91.
  132. Peterson, A.J. (1985). Administration of progesterone early in the sheep cycle and the release of oxitocin and prostaglandin F. In. New Zealand Ministry of Agricul and Fisheries, Agricultural Res. Div. Ann. Report, 1983/84, Wellington, New Zealand p.60.
  133. Piva F., M. Mota y L. Martini. (1983). Regulación de la función hipotalámica e hipofisaria; Mecanismo de feedback largos, cortos y ultracortos. En: Endocrinología. Tomo 1. L.J. De. Groot. Edic. Revol. La Habana.
  134. Plasse, D. (1966). El Brahman americano. Revista del Cebú (mayo.agosto). Venezuela.
  135. Portal M., Contrera F., Cabrera E., Portal A., Martínez G., Hernández J. y Portal R. (1978b). Inducción artificial del celo en hembras bovinas mediante suero artipineal. Resum II Jorn. Cienc. Vet., Villa Clara. Cuba. p. 25.
  136. Portal M., Portal R., Reyes H. y Cabrera E. (1976). Inducciòn artificial del celo y gestación en vacas F2 rown Swiss-Cebú. II Congreso Nac. Cienc. Vet., La Habana.
  137. Portal M., Sierra G., Dulce Portal, F. Contrera, J. Pérez y R. Portal. (1978a). Estudio electroforético en suero de hembras bovinas tratadas con extractos pineales. Resum. II Jorn. Cienc. Vet., Villa Clara. Cuba p. 37.
  138. Prendiville D.J; EnrightWJ; Crowe MA: et al. (1995). Immunization of prepubertal beef heifers against gonadotropin-releasing hormone: immune, estrus, ovarian and growth responses. J. Anim. Sci. 73: 3030.
  139. Procknor M., S. Dachir, R.E. Owens, D.E. Little and P.G. Itarms. (1986). Temporal relationship of the pulsatil fluctuation of luteinizing hormone and progesterone in cattle: A time series cross-correlation analysis J. Anim. Sci. 62: 191.
  140. Purvis H.T., Whittier J.C. (1996). Effects of ionophore feeding and anthelmintic administration on age and weight at puberty in spring – born beef heifers. J. Anim.. Sci. 74:736.
  141. Radchenkov V.P., Butrov E.V., Golenkevich E.K., Sukhikh V.F., Panasenki V.N., Saounov E.G., Matveer V.A., Averin V.S., Ismailov S.A. (1984). Hormonal profile, growth and development of the sexual fuction in heifers. Sal´skok hozyaistvennaya Biologiya 12: 93 (ABA, 1985: 6985 abst.)
  142. Radcliff R.P., Vandeltaar M.J., Skidmore A.L. et al (1997). Effects of diet and bovine somatotropin on heifer growth and mammary development. J. Dairy Sci. 80:1996.
  143. Rajadurai. R. (1977). Role of ovarian steroids on estruc control in bovine. Diss. Abstr. Intern. B, 38: 3.
  144. Rajamahendran R., P.C. Laque and R.D. Baker. (1981). Serum hormone levels and occurrence of oestrus following use of an intravaginal devive containing. progesterone and oestradiol 17b in heifers. Anim. Reprod. Sci. 3: 271.
  145. Rasmussen H. (1974). Organization and control of endocrine systems. En: Textbook of endocrinology. R.H. Williams. Saunders Co. Philadelphia.
  146. Redding T.W., A.V. Schally, A. Arimura and H. Marsvo. (1972). Stimulation of release and synthesis of luteinizing hormone (LH) and follicle stimulating hormone (FSH) in tissue cultures of rat pituitaries in response to natural and synthetic LH and FSH releasing hormone. Endocrinol. 90: 764.
  147. Reeves J.J., T.W. Beck and T.M. Nett. (1974). Serum FSH in anestrous ewes treated with 17b -estradiol J. Anim. Sci, 38: 374.
  148. Restall B.J., Radford H.M., Wallace A.L.C. (1972). Response of lactating ewes to injection of orstradiolbenzoate or testosterone propionate. J. Reprod. Fert. 28: 164. Abstr.
  149. Reynolds L.P., D.A. Robertson and S.P. Ford. (1983). Effects of intrauterine infusion of oestradiol-17b and prostaglandin E-2 on luteal function in non-pregnant neifers. J. Reprod. Fert. 69. 103.
  150. Rhind S.M. and A.S. McNeilly. (1986). Follicle populations, ovulation rates and plasma profiels of LH, FSH and prolactin in scottish blackface ewes in high and low levels of body condition. Anim. Repdioc. Sci. 10:105.
  151. Rieger D., Rawlings N.C. (1985). The influence of estradiol 17b and progesterone on serum levels of LH and FSH in the ewe before and after GnRH treatment. Dom Anim. Endocrinol 2:17.
  152. Ringuet H., Pelletier G., Brazeau P. et al. (1994). Long – torm effects of human growth hormone releasing hormone and photoperiod on hormone release and puberty in dairy heifers. J. Anim. Sci. 72:2709.
  153. Rippel R.H., E.S. Johnson and W.F. White. (1974). Effect of consecutive injections of synthetic gonadotropin releasing hormone on LH release in the anestrous and ovariectomized ewe. J. Anim. Sci. 39: 907.
  154. Rippel, R.H., R.H. Moyer, E.S. Johnson and R.E. Maver. (1974). Response of the ewe to synthetic gonadotropin releasing hormone. J. Anim. Sci. 38: 3; 605.
  155. Rivera J.M., Castillo H.R., J.J.P. Hernández L., J, Pérez. (1982). Crecimiento y reproducción hasta el primer parto en ganado cebú y cebú x europeo en clima tropical. VIII Cong. Nasc. Buiatría, Veracruz, México p.209.
  156. Robinson T.J. (1973). Factors involved in the failure of sperm transport and survival in the female reproductive tract. J. Reprod. Fert. Suppl. 18: 103.
  157. Roche J.F. (1974). Effect of short-term progesterone treatment on aestrous response and fertility in heifers. J. Reprod. Fert. 40: 433.
  158. Roche J.F. (1975). Control of time of ovulation in heifers treated with progesterone and gonadotropin releasing hormone. J. Reprod. Fert. 43 (3): 471.
  159. Roche J.F. Hanrahan J.P., Quirke J.F., Ronayne E. (1984). Effect of melatonin on the time of onset of the breding season in different breeds of sheep. ABA 1986; 54: 1664.
  160. Rodes III R.C., R.D. Randel and P.G. Harms, (1978). Reproductive studies of Brahman cattle IV. Luteinizing hormone levels in ovariectomized Brahman, Brahman x Hereford and Hereford cows following a 20 mg doseof estradiol – 17b . Theriogenology 10: 429.
  161. Rodway R.J., Swift, A.D. (1985). A comparison of PMSG and LHRH agonist treatment in the induction of ovulation in the anoestrous ewe. Anim. Reprod. Sci. 9: 153.
  162. Romanoff E.B. 1966. Steroidogenesis in the perfused bovine ovary. J. Reprod. Fert. Suppl. 1: 89.
  163. Rombauts P., Courot M., Levasseur M-L, Thibault ch. (1961). Nutrition et puberte. Extrait des annales de la nutrition et de L´alimentation Vol. XV. No. 2.
  164. Roque, P.T. (1984). Inducción del celo con progesterona y 500 UI de PMSG en novillas anestricas mestizas de Holstein. Tesis de Diploma. ISCAH.
  165. Roy J.H., Perfitt M.W., Ganderton P., Stobo I.J.F. (1985). The effect of continuous ligt from birth on the age of puberty of friesian heifers reared on high planes of nutrition. Final report 1984-5 <National Institute for Research in Dairy Ing. Reading, U.K. 135.
  166. Roy J.H.B., Gillies Catherine M., Perfitt M.W. and Stobo I.J.F. (1980). Effect of season of the year and phase of the noon on puberty and on the occurrence of oestrus and conception in dairy heifers reared on high planes of nutrition. Anim. <prod. 31:13.
  167. Roy J.H.B., Perfitt M.W. , Ganderton P., Stobo J.J.F. (1985). Comparisobn of the age Puberty of arbeedeen augus x frieseian heifers with that of friesians. Final Report 1984-5 National Institute for Research in Dairying Reading UK 135.
  168. Rutter L.M., T.D. Carrithers and J.G. Manns. (1985). The postpartum induced corpus luteum: Functional differences from thar of cycling cows and the effect of progesterone pretreament Biol Reprod. 33: 560.
  169. Rutter, L.M. (1984). Nutrition/reproduction interactions in beef females. Diss. Abst. Intern., B. (Sci.and Enginee) 44: 2024.
  170. Rysanek M. y Alba O. (1975). Tratamiento de la aciclia postpartum en vacas Cebú mal alimentadas durante el período de sequía con PMSG y HCG. Centro Ser. Cienc. Anim. II, 1-2: 125.
  171. Sadleir R.M.F.S. (1969). The ecology of Reproduction in wild and domestic mammals. Methven, London, 321 pp.
  172. Salirbury G.W. (1946). (Inédito) Cornell Univ. Citada por Salisbury y Vandemark. 1961.
  173. Salirbury G.W. and N.L. Vandemark, (1961). Physiology of reproduction and artificial insemination of cattle. Phyladelphia, New York, W.H. Freeman and company.
  174. Santos A. y M. Pereiro. (1982). Efecto del tratamiento hormonal en la fertilidad de novillas F1 (Holstein x Cebú) en pastoreo y suplementadas con miel/urea 2% durantela seca. Rev. Cubana Cienc. Agric. 16: 17.
  175. Saumande J. (1978). Relationships between ovarian stimulation by PMSG and steroid secretion, 169-194. En: Sreenan J.M., EEC Symp.: Control of reproduction in the cow, Nijhoff. The hague, Boston, London.
  176. Sawin C.T. (1971). Las hormonas, Fisiología endocrina. 1ra. ed. p.153. Salvat, S.A. Barcelona.
  177. Scaramuzzi J., D.T. Baird. (1977). Pulsatile release of luteinizing hormone and the seccretion of ovarian steroids in sheeep during anestrus. Endocrinol. 101:1801
  178. Scaramuzzi R.J., D.T. Baird, N.D. Martenz, K.E. Turnbukll and P.F.A. Van Look. (1981). Ovarian function in the ewe after active inmunization against testosterone. J. Reprod. Fert. 61:1.
  179. Schallenberger E., J. Rampp and D.L. Walters. (1983). Pulsatile progesterone secretion occurs during midgestation in the cow even though pulsatile LH secretion is abolished. J. Anim. Sci. 57: 371.
  180. Schally A.V., A. Arimura, Y. Baha, R.M.G. Noir, H. Matsvo, T.W. Redeling, L. Debeljok and W.F. white. (1971). Isolation and properties of the FSH and LH realising hormone. Biochm. Biophys. Res. Comm. 43: 393.
  181. Schams D. Buts E.D. (1972). Zeitliche Bezichungen swischen Brunstsymptomen, elektrischn widers tandsmessungen des vaginalscheims, präovulatorischer Ausschüttung des luteinisierungshormons und ovulation brim rind. Zuchthyg 7:49.
  182. Schams D., Ch. Menzer, E. Schallenberger, B. Hoffmann, J. Hahn and R. Hahn. (1978). Some studies on pregnant mare serum gonadotrophin (PMSG) and on endocrine responses after application for superovulation in cattle. En: Sreenan J. M., CEC Semin. Control of reproduction in de cow. Galway. (1977), 122-143.
  183. Schams D., Schallenberger E., Gombe S., Karg H. (1981). Endocrine patterns associated with puberty in male and female cattle. J. Reprod. Fert. Suppl. 30, 103-110
  184. Schillo K.K., D.J. Diersch ke and E.R. Hauser. (1982). Influences of month of birth and age on patterns of luteinizing hormone secretion inprepubertal heifers. Theriogenology 18: 593.
  185. Schillo K.K., Dierschke D.J., Hauser E.R. (1983b). Estrogen induced release of luteinizing hormone in prepubertal and postpubertal heifers. Theriogenology 19: 727.
  186. Schillo K.K., Hansen P.J., Kamwanja L.A., Dierschke D.L., Hauser E.R. (1983a). Influence of season on sexual development in heifers: Age at puberty as related to growth and serum concentrations of gonadotropins, prolactin, thyroxine and progesterone. Biol Reprod. 28: 329.
  187. Schillo Keith K. (1992). Effects of dietary energy on control of luteinizing hormone secretion in cattle and sheep. J. Anim. Sci. 70:1271.
  188. Schoenemann H.M. (1985). III Studies of pituitary luteinizing hormone releasing hormone (LHRH) receptor in the cow. Diss. Abstr. Interns. B. (Sci. and Engin) 45: 2459.
  189. Schoppec PD; Armstrong JD; Harvey RW; et al. (1995). Endocrine and ovarian response to exogenous estradiol-17 beta in 6-month old heifers previously immunized against growth hormone releasing factor. J. Anim. Sci. 73: 2071.
  190. Schoppec PD; Armstrong JD; Harvey RW; et al. (1996). Immunization against growth hormone releasing factor or chronic feed restriction initiated at 3.5 months of age reduces ovarian response to pulsatile administration of gonado tropin-releasing hormone at 6 months of age and delays onset of puberty in heifers. Biology Reprod. 55: 87.
  191. Seidel G.E., L.L. Larson and R.H. Foote. (1971). Effects of age and gonadotropin treatment on superovulation in the calf. J. Anim. Sci. 33: 617
  192. Seift B.L., R.W. Johnson and G.M. Thomas. (1983). Anestrus in cycling beef heifers experimenttally incoculated with anaplasma marginale. Theriogenology 20: 715.
  193. Sergent D., Gauthier D., Vhemineau R. (1984). Effect of exposure to sunlght on some endocrinological traits in creole goats and cattle in Guadeloupe. Reproduction des ruminants en zone tripicale. Reunión internationale, Pointe-á-Pitre, Guadeloupe, 8-10.
  194. Sheffield L.G., Ellicott A.R. (1982). Effect of levels of exogenous progesterone on puberty in beef heifers. Theriogenology 18: 177.
  195. Shemesh M. and Hansel W. (1974). Measurement of bovine plasma testosterone by radioimmunoassay (RIA) and by rapid competitive protein binding (CPB) assay. J. Anim. Sci. 39: 720.
  196. Shorron S.M., J.H.B. Roy and G.S. Pope. (1978). Plasma progesterone concentrations from before puberty to after parturition in british friesian heifers reared on high planes of nutrition and inseminated at their first oestrus. Anim Prod. 27: 89.
  197. Short R.E. y Bellows R.A. (1971). Relation ships among weihgt gains, age at puberty and reproductive performance in heifers. J. Anim. Sci. 43: 1254.
  198. Short R.E., Howland B.E., Randel R.., Christensen D.S. and Bellows R.A. (1973). Induced LH release in spayed cows. J. Anim. Sci. 37: 551.
  199. Short R.E., R.A. Bellows, J.B. Carr, R.B. Staigmiller and R.D. Randel. (1976). Induced or synchronized puberty in heifers. J. Anim. Sci. 43: 1252.
  200. Short R.E., R.D. Randel, R.B. Staigmiller and R.A. Bellows. (1979). Factors affecting estrogen-induced LH release in the cow. Biol. Reprod. 21: 683.
  201. Skagg C.L., B.V. Able and J.S. Stevenson (1986). Pulsatile or continuous infusion of LH-RH and hormonal concentration in prepubertal beef heifers. J. Anim. Sci. 62: 1034.
  202. Smith, M.F. (1986). Recent advances in corpus luteum physiology. J. Dairy Sci. 69: 911.
  203. Solano R., Fernández O. y Martínez G. (1983). Dinámica de los niveles de progesterona y LH características del ciclo estral en novillas Holstein bajo condiciones climáticas tropicales. Libro Res. III Sem. Cient. CENSA, La Habana dic. 15-17, p. 200.
  204. Sorensen AM, Hansel W, Hough WH, et al.(1959).Causes and prevention of reproductive failures in dairy cattle. I. Influence of under feeding and overfeedingon growth and development in Holstein heifers. Cornell Univ Agr Expt Sta Bull :936.
  205. Spicer. L.J., K.Sejrsen, H.A. Tucker and J.T. Huber, (1984). Secretion of luteinizing hormona and follicle. Stimulating hormone from overfeediung dairy heifers. J. Dairy Sci. 67; 1993.
  206. Spilman C.H., G.E. Jr. Seidel, L.L. Larson and R.H. Foote. (1972). In vitro progesterone synthesis by corpora lutea induced in prepuberal cattle. J. Anim. Sci, 34: 1025.
  207. Spilman, C.H., G.E. Seidel, J.R., L.L. Larson, G.R. Vukman and R.H. Foote, (1973). Progesterone, 20 b -hidroxipreg.4.en.3.one, and luteinizing hormone levels in superovulated prepuberal and post puberal. Cattle. Biol. Reprod. 9: 116.
  208. Spitzer J.C. (1982). Pregnancy rate in peripuberal beef heifers following treatment with syncromate-B and gonadotropin releasing.hormone. Theriogenology 17. 373.
  209. Spitzer, J.C., G.D. Niswender, G.E. Seidel. Jr. and J.N. Wiltbank, 1978. Fertilization and blood levels of progesterone and LH in beef neifers on a restricted energy diet. J. Anim. Sci. 46: 4; 1071.
  210. Stabenfeldt G.H. (1974). Physiologic, pathologic and therapeutic roles of progestins in domestic animals. J. Amer. Vet. Med. Assoc. 164:311.
  211. Stabenfeldt G.H., H. Kindahl, L.E. Edquist. (1976). Radioisotopic techniques for the study of reproductive physiology in domestic animals; 2, Physiological implications. En. Nuc. Tech.Anim. Prod. Hesalth Proc. Symp.
  212. Staigmiller R.B., R.E. Short and R.A. Bellows. (1979). Induction of LH surges with 17b estradiol in prepuberal beef heifers: An age dependent response. Theriogenology 11: 453.
  213. Stanisiewski E.P., N.K. Ames, L.T. Chaplin, C. Blaze, and H.A. Tucker. (1986). Effect of pinealectomy on prolactin and testosterone concentrations in plasma of bull calves exposed to 8 or 16 hours of light per day. J. Dairy Sci. 69 (Suppl. 1) p. 166 (abstr.)
  214. Steward F., Allen W.R. and Moor R.M. (1976). Pregmant marte serungonadotropin;Rtio of follicle stimulating and luteinizing hormone activities measured by radioreceptor assay. J. Endocri. 71:371.
  215. Suzuki O. and Sato M. (1980). (Puberty and serum levels of progesterone and estradiol-17b in beef heifers) Bull. Natn. Grassld Res. Inst. Japan 16: 96.
  216. Suzuki O. Sato M., Kubota Y. (1982). Effects of under feeding on oestrous behavious and ovarian function in post pubertal beed heifers. Japanese J. Anim. Reprod. 28:205.
  217. Swanson L.V., H.D. Hafs and D.A. Morroe. (1972). Ovarian characteristic and serum LH, prolactin, progesterone and glucocorticoid from first estrus to breeding size in Holstein heifers. J. Anim. Sci. 34: 284.
  218. Swift B.L., W.J. Murdoch and R.R. Dahlgren. (1984). Anemia associeted with anestrus in beef heifers inoculated with anaplasma marginale: Endocrinology and ovarian changes. Theriogenology 22: 643.
  219. Sygnoret J.P. (1967). Duree du cycle oestrien et de loestrus chez la trvi, action du benzoate doestradiol chez la femelle ovariectomisee. Ann. Biol. Anim. Bioch. Biophys 7:1.
  220. Symons, A.M. (1976). The LH response of pregnant cows and their calves to synthetic LH-RH. J. Reprod. Fert. 46: 235.
  221. Tanaka Y., Vincent D.L., Ledgerwood K.S. et al.. (1995). Variable progesterone response and estradiol secretion in prepubertal beef heifers following teatment with norgestomet implants. Theriogenology 43:1077.
  222. Tarrero R., Pedroso, R. Perón N. y Santiago N. (1981). Influencia de la alimentación en terneras ¾ Holstein x ¼ Cebú durante el crecimiento y su comportamiento reproductivo posterior. Informe preliminar. Resumenes II Seminario Cient. CENSA. La Habana.
  223. Tarrero R. y Perón N. (1983). Influencia de tres dietas de miel y urea en el comportamiento reproductivo de las novillas. Libro Res. Y 4ta. Reunión ACPA, 12-14 dic. La Habana p.145.
  224. Tezuka, M., M. Irahara, et al. (2002). Effects of leptin on gonadotropin secretion in juvenile female rat pituitary cells. Eur J Endocrinol 146(2): 261.
  225. Thatcher W.W, Smith EJP, de la Sota RL et al. (1996). Desarrollo folicular en el período del postparto: anestro, efecto, del balance energético, nutrición y condición corporal sobre el desarrollo folicular y la fertilidad en el postparto de vacas en lactación. II Simposio Int. Reprod. Anim. 31 Oct.- 2 Nov. Carlos Paz. Córdoba, Argentina pp. 23-52.
  226. Thibaulth Ch. and Marie – Claire Levasseur. (1974). Reproductive life Cycle. En reproduction in Farm Animals, de. E.S.E. Hafez, De. Lea and Febiger Philad. 3era. de. p.82.
  227. Thibier M. (1981). Hormonologie de la reproduction un now veau concept: La regulation endocrine par modulation de frecuence. Rec. Med. Vet., 157:15
  228. Topps J.H. (1977). The relationship between reproduction andundernutrition in beet cattle. Woel Reviev Anim. Reprod. 13:2; 43.
  229. Tucker H.A. (1982). Seasonality in cattle. Theriogenology 17:53.
  230. Vichot, O. Cortada A., Estrada J., Fernández F. (1976). Comportamiento reproductivo de novillas anéstricas tratadas con progesterona y gonadotropina sérica (PMSG). II Cong. Nac. Cienc. Vet. LA Habana. p.6.
  231. Vincent D.L. (1983). Ovarian and pitvitary responses of seasonally and postpartum anestrous eswesto gonadotropin releasing hormone. Dissertation Abstracts International, B. (Sciences and Angineering) 44:1657.
  232. Wagner J.F., Veenhuizen E.L., Tankinson L.V> and Rathmacher R.P. (1973).Effect of placental gonadotrophin on pregnancy rate in the bovine. J. Anim. Sci. 36:1129
  233. Walters D.L., D. Schams and E. Schallenberger. (1984). Pulsatile secretion of gonadotrophins, ovarian steroids and ovarian, oxytocin during the luteal phase of the oestrous cycle in the cow. J. Reprod. Fert. 71:479.
  234. Walters D.L., R.E. Short, E.M. Convey, R.B. Staigmiller, T.G. Dunn and C.L. Kaltenbach. (1982). Pitvitary and ovarian function in postpartum beef cows. II Endocrine Changes prior to ovulation in suckled and non sucklet postpartum cows compared to cycling cows. Biol. Reprod. 26:647.
  235. Wehrman M.E., Kijima F.N., Sánchez T. (1996). Incidence of precocious puberty in developing beef heifers. J. Anim. Sci. 74:2462.
  236. Werre JF, Brinks JS. (1986). Relationships of age at pubertu with growth and subsequent productivity in beef heifers. Proc. West sect Am. Soc. Anim. Sci. 37: 300.
  237. Wettemann RP, Castree J.W. (1994). Immunization of heifers against gonadotropin releasing hormone delays puberty and causes the cessation of estrous cycles. Anim Reprod. Sci. 36: 49.
  238. Yelich J.V., Wettemann R.P., Dolezal H.G. et al. (1995). Effect of growth rate on carcass composition and lipid partitioning ot puberty and growth hormone, insuline like growth factor Y, insulin and metabolites before puberty in beef heifers. J. Anim. Sci. 73:2390.
  239. Yellon S.M., Bittman E.L., Lehman M.N., Olster D.H., Robinson J.E., Karsch F.J. (1985). Importance of duration of nocturnal malatonin secretion in determining the reproductive response to inductive photoperiod in the ew. Biol. of Reprod. 32:523.
  240. Zamora A. y Amparo González. (1986). Efecto del nivel de suplementación en la ganancia diaria y comportamientoreproductivo de novillas Holstein en pasto estrella. Y Primera Réplica 1982-83. Resum. 5ta. Reunión ACPA. La Habana.
  241. Zamora A., A. Elias y L. Zarragoitia. (1985). Comportamiento de novillas lecheras en pasto pangola (Digitaria decumbens Stent) con diferentes cargas. Y Primer año iniciado en la época de seca. Rev. Cub. Cienc. Agric. 19:247.
  242. Zemjanis R. (1974). Pregnancy diagnosis en: Reproduction in farm animal E.S.E. Hafez, 3th. de. Lea and Febiger. Philadelphia.
  243. Zhied A.A., H.A. Garberick, C.J. Bierschwal, R.G. Elmore, R.S. Youngquist and A.J. Sharp. (1980). Effect of ovarian activity and endogenous reproductive hormones on GnRH – induced ovarian cycles in postpartum dairy cows. J. Anim. Sci. 50:3, 508.
  244. Zieba, D. A., M. Amstalden, et al. (2004). Regulatory Roles of Leptin at the Hypothalamic-Hypophyseal Axis Before and after Sexual Maturation in Cattle. Biol Reprod 71(3): 804
  245. Zolman J.E., Convey L.W., Brittand H.P. y Hafs H.D. (1973). Release of bovine LH by purified porcine and synthetic gonadotrophin releasing hormone. Proc. Sco. Expth. Bio. Med. 142:189

 

 

 

Autor:

Dr. Roberto Faure García

Dr. Octavio Fernández Limia

Dirección de Salud y Producción Animal,

Centro Nacional de Sanidad Agropecuaria

La Habana, Cuba

Septiembre de 2006

Partes: 1, 2, 3, 4
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