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- W2767967487 abstract "The current review summarizes progress in the field of in vitro and in vivo production of South American Camelid embryos. Both methods require ovarian superstimulation (with FSH and eCG) to obtain multiple ovulations (in vivo embryo production) or to induce follicle growth for oocyte collection (in vitro embryo production). Moreover, superstimulation entails prior administration of hormones that inhibit follicular growth (progesterone, progestagens, and estrogens). Cumulus-oocyte complexes obtained must mature in vivo (buserelin administration) or in vitro to then be subjected to in vitro fertilization or intracytoplasmic sperm injection. All these techniques also require morphologically normal, motile spermatozoa to achieve fertilization. Methods used to decrease semen viscosity and to select the best spermatozoa (Percoll®; Androcoll-ETM) are described. Additionally, nuclear transfer or cloning has been applied in llamas. Up to now, embryo deep-freezing and vitrification have progressed slowly but are at the height of development. Embryos that are obtained by any of these techniques, either in vivo or in vitro, need to be transferred to synchronized recipient females. The best results are achieved after transfer to the left uterine horn with an ipsilateral ovulation. No live offspring have been obtained after the transfer of cryopreserved embryos. Applying reproductive biotechnologies, such as those described, will permit the expansion of genetically selected animals in the population and also that of wild camelid species, vicunas, and guanacos, whose embryos could then be transferred to the uterus of domestic species." @default.
- W2767967487 created "2017-11-17" @default.
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- W2767967487 date "2017-11-13" @default.
- W2767967487 modified "2023-10-15" @default.
- W2767967487 title "Production, Preservation, and Transfer of South American Camelid Embryos" @default.
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- W2767967487 doi "https://doi.org/10.3389/fvets.2017.00190" @default.
- W2767967487 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5693846" @default.
- W2767967487 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29181380" @default.
- W2767967487 hasPublicationYear "2017" @default.
- W2767967487 type Work @default.