VALIDATION OF A PROGRAM PRODUCTION IN VITRO EMBRYO CATTLE WITH TRANSPORT OF OOCYTES AND EMBRYO FOR LONG DISTANCE
DOI:
https://doi.org/10.5216/cab.v15i1.23327Keywords:
Animal ReproductionAbstract
This study aimed to evaluate the program of in vitro embryo production (IVEP) feasibility whose cattle oocyte maturation and embryo development occurred partly during the transport, fertilization (IVF) was performed with conventional or sexed semen and the embryos were transferred at different periods of development. Therefore, oocytes aspirated in the state of Bahia were transported to a commercial laboratory in São Paulo city, where the steps of in vitro production continued, the IVF was performed with sperm derived from conventional semen (CONV group) or sexed group (SEX group). On the sixth day of cultivation, the embryos produced were sent to Bahia and transferred to recipients at different periods of development (6.5, 7.0 and 7.5 days). The females had a mean of 46.18 ± 32.7 oocytes recovered, and 30.74 ± 24.3 viable oocytes by aspiration. The rates of embryos produced and pregnancy were 32.85% and 33.12%, respectively. The type of semen did not affect neither the number of cleaved oocytes nor the pregnancy rates, however, it affected the number of embryos produced, and the age of the embryo interfered in the pregnancy rates. The results demonstrated that the transport of oocytes and embryos was effective in cattle IVEP program, thus, it can be used in large scale.
KEYWORDS: Bos indicus; sexed semen; transfer of embryos.
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