Induction of superovulation in South American camelids
The development of assisted reproductive technologies such as embryo transfer (ET), artificial insemination (AI) and in vitro fertilization (IVF) in South American camelids is considerably behind that of other livestock species. Poor success of the embryo transfer technique has been related to a lac...
| Autores principales: | , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier B.V.
2023
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/20.500.12955/2127 https://doi.org/10.1016/j.anireprosci.2012.10.006 |
| _version_ | 1855490272286212096 |
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| author | Ratto, Marcelo H. Silva, Mauricio E. Huanca López, Wilfredo Huanca Mamani, Teodosio Adams, Gregg Patrick |
| author_browse | Adams, Gregg Patrick Huanca López, Wilfredo Huanca Mamani, Teodosio Ratto, Marcelo H. Silva, Mauricio E. |
| author_facet | Ratto, Marcelo H. Silva, Mauricio E. Huanca López, Wilfredo Huanca Mamani, Teodosio Adams, Gregg Patrick |
| author_sort | Ratto, Marcelo H. |
| collection | Repositorio INIA |
| description | The development of assisted reproductive technologies such as embryo transfer (ET), artificial insemination (AI) and in vitro fertilization (IVF) in South American camelids is considerably behind that of other livestock species. Poor success of the embryo transfer technique has been related to a lack of an effective superstimulatory treatment, low embryo recovery rate, and the recovery of hatched blastocysts that are not conducive to the cryopreservation process. Superstimulation has been attempted using equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) during the luteal, or the sexually receptive phase, sometimes given at follicular wave emergence. The rationale for inducing a luteal phase prior to or during superstimulation in camelids is not clearly understood, but it may simply reflect an empirical bias to conventional methods used in other ruminants. The number of ovulations or CL varies widely among studies, ranging from 2 to more than 15 per animal, with the number of transferable embryos ranging from 0 to 4 per animal. The control of follicular growth combined with superstimulatory protocols has resulted in a more consistent ovarian response and a greater number of follicles available for aspiration and oocyte collection. Recent studies in llamas have demonstrated that the use of ovulation inducing treatments or follicle ablation can synchronize follicular wave emergence allowing the initiation of gonadotropin treatment in the absence of a dominant follicle resulting in a more consistent ovulatory response. Few studies in alpacas have been reported, but it appears from recent field studies that the ovarian response is more variable and that there is a greater number of poor responders than in llamas. A review of superstimulation protocols that have been used in llamas and alpacas in the last 15 years is provided, including a discussion of the potential of protocols designed to initiate treatment at specific stages of follicular growth. |
| format | Artículo |
| id | INIA2127 |
| institution | Institucional Nacional de Innovación Agraria |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Elsevier B.V. |
| publisherStr | Elsevier B.V. |
| record_format | dspace |
| spelling | INIA21272024-11-29T03:38:24Z Induction of superovulation in South American camelids Ratto, Marcelo H. Silva, Mauricio E. Huanca López, Wilfredo Huanca Mamani, Teodosio Adams, Gregg Patrick Superovulation Embryo transfer Llamas Alpacas Gonadotropins https://purl.org/pe-repo/ocde/ford#4.02.01 Superovulation Gonadotropins Superovulación Gonadotropinas The development of assisted reproductive technologies such as embryo transfer (ET), artificial insemination (AI) and in vitro fertilization (IVF) in South American camelids is considerably behind that of other livestock species. Poor success of the embryo transfer technique has been related to a lack of an effective superstimulatory treatment, low embryo recovery rate, and the recovery of hatched blastocysts that are not conducive to the cryopreservation process. Superstimulation has been attempted using equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) during the luteal, or the sexually receptive phase, sometimes given at follicular wave emergence. The rationale for inducing a luteal phase prior to or during superstimulation in camelids is not clearly understood, but it may simply reflect an empirical bias to conventional methods used in other ruminants. The number of ovulations or CL varies widely among studies, ranging from 2 to more than 15 per animal, with the number of transferable embryos ranging from 0 to 4 per animal. The control of follicular growth combined with superstimulatory protocols has resulted in a more consistent ovarian response and a greater number of follicles available for aspiration and oocyte collection. Recent studies in llamas have demonstrated that the use of ovulation inducing treatments or follicle ablation can synchronize follicular wave emergence allowing the initiation of gonadotropin treatment in the absence of a dominant follicle resulting in a more consistent ovulatory response. Few studies in alpacas have been reported, but it appears from recent field studies that the ovarian response is more variable and that there is a greater number of poor responders than in llamas. A review of superstimulation protocols that have been used in llamas and alpacas in the last 15 years is provided, including a discussion of the potential of protocols designed to initiate treatment at specific stages of follicular growth. 2023-03-31T22:15:53Z 2023-03-31T22:15:53Z 2013-01-10 info:eu-repo/semantics/article Ratto, M., Silva, M., Huanca, W., Huanca, T., & Adams, G. (2013). Induction of superovulation in South American camelids. Animal Reproduction Science, 136(3), 164-169. doi: 10.1016/j.anireprosci.2012.10.006 0378-4320 https://hdl.handle.net/20.500.12955/2127 https://doi.org/10.1016/j.anireprosci.2012.10.006 eng urn:issn:0378-4320 Animal Reproduction Science info:eu-repo/semantics/restrictedAccess application/pdf Elsevier B.V. NL Instituto Nacional de Innovación Agraria Repositorio Institucional - INIA |
| spellingShingle | Superovulation Embryo transfer Llamas Alpacas Gonadotropins https://purl.org/pe-repo/ocde/ford#4.02.01 Superovulation Gonadotropins Superovulación Gonadotropinas Ratto, Marcelo H. Silva, Mauricio E. Huanca López, Wilfredo Huanca Mamani, Teodosio Adams, Gregg Patrick Induction of superovulation in South American camelids |
| title | Induction of superovulation in South American camelids |
| title_full | Induction of superovulation in South American camelids |
| title_fullStr | Induction of superovulation in South American camelids |
| title_full_unstemmed | Induction of superovulation in South American camelids |
| title_short | Induction of superovulation in South American camelids |
| title_sort | induction of superovulation in south american camelids |
| topic | Superovulation Embryo transfer Llamas Alpacas Gonadotropins https://purl.org/pe-repo/ocde/ford#4.02.01 Superovulation Gonadotropins Superovulación Gonadotropinas |
| url | https://hdl.handle.net/20.500.12955/2127 https://doi.org/10.1016/j.anireprosci.2012.10.006 |
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