Efeito do dia da transferência de embrião na taxa de prenhez em éguas / Effect of the day of embryo transfer on pregnancy rate of mares

ABSTRACT

Embryo transfer in mares is a very important biotechnology to improve genetic material. The aim of thepresent study was to evaluate the best day for embryo transfer, according to the synchronization between thedonor and the recipient mare, evaluating quality and stage of the collected embryo. It was obtained an embryorecovery rate of 56.06% of the embryo flushes, a rate that was similar for D7, D8 and D9. There was nostatistical difference relating to embryo stage and quality and collection day, and neither to the pregnancy rateafter the transfer, according to the embryo age.