Effect of embryo collection technique on embryo recovery rate in mares

One hundred and fourteen embryo collections were performed in donor mares of crossbred Breton and Campolina breeds randomly allotted to two treatments: T1 - interrupted flushing (n=56), embryo flushing system whereby an embryo filter was inserted in the recovery line, and T2 - direct flushing (n=58), without flushing interruption. The flushing medium was the Ringer lactate. No differences between T1 and T2 were observed for the embryo recovery rate (58.9% and 44.8%), for the quality of the embryos (3.56 and 3.53), for the recovery medium from the uterus (1962.10ml, 98.1% and 1962.39ml, 98.1%) and for the pregnancy rate of the transferred embryo (52.9% and 81.8%). Also, no differences between T1 and T2 for length of collection (10.3 and 7.4 minutes), and for interval from the collection to transference (39.5 and 65.7 minutes) were observed.

Equine; embryo; collection technique; recovery rate

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