The effect of mare's age on multiple ovulation rate, embryo recovery, post-transfer pregnancy rate, and interovulatory interval in a commercial embryo transfer program in Argentina

•We characterized the effect of donor's age on different reproductive parameters.•Advanced donor's age is associated with a reduced embryo recovery rate (ERR).•The multiple ovulation rate is highest in old mares.•The interovulatory interval (IOI) is longest in aged mares.•The ERR increases...

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