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1998, Número 3

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Vet Mex 1998; 29 (3)


Efecto del tratamiento con hCG al momento de la inseminación artificial sobre la función del cuerpo lúteo y fertilidad de vacas Holstein repetidoras

Morales RJS, Hernández CJ, Vázquez GJA

Idioma: Español/Inglés
Referencias bibliográficas: 31
Paginas: 269-272
Archivo PDF: 409.83 Kb.


RESUMEN

Se realizaron dos experimentos con el propósito de determinar si el tratamiento con gonadotropina coriónica humana (hCG) al momento de la inseminación artificial mejora la función del cuerpo lúteo, así como el porcentaje de concepción de vacas Holstein repetidoras. En el experimento 1 se seleccionaron 17 vacas Holstein bajo el siguiente criterio: Vacas con más de 3 servicios infértiles previos y sin anormalidades del aparato reproductor. Las vacas fueron divididas en dos grupos: Grupo hCG (n = 8), recibieron al momento de la inseminación 2500 UI de hCG. Grupo testigo (n = 9), no recibieron tratamiento. Se tomaron muestras de sangre para la determinación de progesterona diariamente desde el día de la inseminación (día 1) hasta el día 16. Las concentraciones de progesterona se compararon entre grupos mediante análisis de varianza para mediciones repetidas. En el experimento 2, se revisaron los resultados de 2 538 inseminaciones de vacas repetidoras seleccionadas bajo el mismo criterio del experimento 1. Mediante una prueba de Ji-cuadrada se comparó el porcentaje de concepción de 211 vacas que recibieron 2 500 UI de hCG al momento de la inseminación, con el que se obtuvo en 2 327 vacas que no recibieron tratamiento. Las concentraciones de progesterona fueron similares en las vacas del grupo tratado con hCG y testigo (P›0.05). Tampoco se encontró diferencia (P›0.05) en el porcentaje de concepción de las vacas del grupo hCG (40.8%; 86/211) y las testigo (34.2%; 795/2327). Se concluye que la administración de hCG al momento de la inseminación no mejoró la función del cuerpo lúteo ni el porcentaje de concepción de vacas Holstein repetidoras.


REFERENCIAS (EN ESTE ARTÍCULO)

  1. Ayalon N. A review of embryonic mortality in cattle. J Reprod Fert 1978;5:483-493.

  2. Linares T. Embryonic development in repeat breeder and virgin heifers seven days after insemination. Anim Reprod Sci 1982;4:189-198.

  3. Gustafsson H. Characteristics of embryos from repeat breeder and virgin heifers. Theriogenology 1985;23:487-498.

  4. Kimura M, Nakao T, Moriyoshi M, Kawata K. Luteal phase deficiency as a possible cause of repeat breeding in dairy cows. Br vet J 1987;143:560-566.

  5. Shelton K, Gayerie-De Abreu MF, Hunter MG, Parkinson TJ, Lamming GE. Luteal inadequacy during the early luteal phase of subfertile cows. J Reprod Fert 1990;90:1-10.

  6. Roberts RM, Bazer FW. The functions of uterine secretions. J Reprod Fert 1988;82:875-892.

  7. Van Cleeff J, Drost M, Thatcher WW. Effects of postinsemination progesterone supplementation on fertility and subsequent estrous responses of dairy heifers. Theriogenology 1991;36:795-807.

  8. Wiltbank JN, Hawk HW, Kidder HE, Black WG, Ulberg LC, Casida LE. Effect of progesterone therapy on embryo survival in cows of lowered fertility. J Dairy Sci 1956;39:456-461.

  9. Robinson NA, Leslie KE, Walton JS. Effect of treatment with progesterone on pregnant rate and plasma concentrations of progesterone in Holstein cows. J Dairy Sci 1989;72:202-207.

  10. Stevenson JS, Call EP, Scoby RK, Phatak AP. Double insemination and GnRH treatment of repeat-breeding cattle. J Dairy Sci 1990;73:1766-1772.

  11. Swanson LV, Young AJ. Failure of gonadotropin-releasing hormone or human chorionic gonadotropin to enhance the fertility of repeat-breeder cows when administered at the time of insemination. Theriogenology 1990;34:955-963.

  12. Bon Durant RH, Revah I, Franti C, Harman RJ, Hird D, Klingborg D, et al. Effect of gonadotropin-releasing hormone on fertility in repeat-breeder California dairy cows. Theriogenology 1991;35:365-374.

  13. Hernandez-Ceron J, Zarco L, Lima-Tamayo V. Incidence of delayed ovulation in Holstein heifers and its effects on fertility and early luteal function. Theriogenology 1993;40:1073-1081.

  14. Sianangama PC, Rajamahendran R. Effect of human chorionic gonadotropin administered at specific times following breeding on milk progesterone and pregnancy in cows. Theriogenology 1992;38:85-96.

  15. Ryan DP, Kopel E, Boland, MP, Godke RA. Pregnancy rates in dairy cows following the administration of a GnRH analogue at the time of artificial insemination or at mid-cycle post insemination. Theriogenology 1991;36:367-377.

  16. Ullah G, Fuquay JW, Keawkhong T, Clark BL, Pogue DE, Murphey EJ. Effect of gonadotropin-releasing hormone at estrus on subsequent luteal function and fertility in lactating Holstein during heat stress. J Dairy Sci 1996;79:1950-1953.

  17. Ryan DT, Snijders S, Condon T, Grealy M, Sreenan J, O'Farrell KJ. Endocrine and ovarian responses and pregnancy rates in dairy cows following the administration of a gonadotrophin releasing hormone analog at the time of artificial insemination or at mid-cycle post insemination. Anim Reprod Sci 1994;34:179-191.

  18. Zarco L, Hernández J. Momento de ovulación y efecto del intervalo entre el inicio del estro y la inseminación artificial sobre el porcentaje de concepción de vaquillas Holstein. Vet Méx 1996;27:279-283.

  19. Lucy MC, Stevenson Js. Gonadotropin-releasing hormone at estrus: luteinizin-g hormone, estradiol, and progesterone during the periestrual and postinsemination periods in dairy cattle. Biol Reprod 1986;35:300-311.

  20. Rosenberg M, Chun SY, Kaim M, Herz Z, Folman Y. The effect of GnRH administered to dairy cows during oestrus on plasma LH and conception in relation to the time of treatment and insemination. Anim Reprod Sci 1991;24:13-24.

  21. Berger VG. Application of hCG and GnRH effects on conception of cows in the context of tertiary insemination. Monat Vet Med 1988;43:221-223.

  22. García de ME. Modificaciones al sistema de clasificación climatológica de Koëppen. 5a ed. México (DF): Instituto de Geografía, UNAM, 1973.

  23. 23.National Research Council. Nutrient requirements of dairy cattle. Washington (DC): NationalAcademy Press, 1988.

  24. Pulido A, Zarco L. Galina CS. Murcia C. Flores G. Posadas E. Progesterone métabolism duting storage of blood samples from Gyr cattle: effects of anticoagulant, time and temperature of incubation. Theriogenology 1991;35:965-975:

  25. Echternkamp SE, Maurer RR. Conception, embryonic development and Corpus luteum function in beef cattle open for two consecutive breeding seasons. Theriogenology 1983;20:627-637.

  26. Helmer SD, Britt JH. Fertility of dairy cattle treated with human chorionic gonadotropin (hCG) to stimulate progesterone secretion. Theriogenology 1986;26:683-695.

  27. Helmer SD, Britt JH. Hormone secretion and characteristics of estrous cycles after treatment of heifers with human chorionic gonadotropin or prostaglandin F2a during corpus luteum formation. J Anim Sci 1987;64:782-789.

  28. Walton JS, Halbert GW, Robinson NA, Leslie KE. Effects of progesterone and human chorionic gonadotrophin administration five days postinsemination on plasma and milk concentrations of progesterone and pregnancy rates of normal and repeat breeder dairy cows. Can J Vet Res 1990;54:305-308.

  29. Breuel KF, Spitzer JC, Thompson GE, Breuel JF. First service pregnancy rate in beef heifers as influenced by human chorionic gonadotropin administration before and/or after breeding. Theriogenology 1990;34:139-145.

  30. Price CA, Webb R. Ovarian response to hCG treatment during the oestrous cycle in heifers. J Reprod Fert 1989;86:303-308.

  31. Hansel W, Spalding RM, Larson LL, Laster DB, Wagner JF, Braun RK. Influence of human chorionic gonadotropin on pregnancy rates in lactating dairy and beef cows. J Dairy Sci 1976;59:751-754.




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