Abstract

PACHECO, Joel Iván; VELEZ, Víctor Manuel; ANGULO-TISOC, José Manuel  and  GARCIA, Wilber. Embryo transfer of super ovulated and single ovulated llamas at two periods of the year and under field conditions. Rev. investig. vet. Perú [online]. 2021, vol.32, n.1, e19511. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v32i1.19511.

Two embryo production protocols were evaluated: superovulation and single ovulation, determining the collection rate and quality of the embryos, as well as fertility and natality during the reproductive and non-reproductive season, at 4200 meters above sea level and under field conditions. The collection rate of embryos in single ovulation was 53% (44/83) embryos versus 242.3% (63/26) in superovulation. The quality of the embryos collected by single ovulation was: grade I (90.3 and 83.6%) and grade II (9.4 and 16.7%) and none of grade III; while in superovulation it was: grade I (76.6 and 87.5%), grade II (14.9 and 12.5%) and grade III (8.5 and 0%) for the reproductive and nonreproductive seasons, respectively. Fertility was similar between single ovulation (56.4%) and superovulation (56.0%). The birth rate was 41.1 and 30.0% for single ovulation and superovulation, respectively. It is concluded that both techniques represent a feasible alternative for their application in the high Andean llama rearing systems.

Keywords : llama; embryo; embryo transfer; ovulation.

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