I have a friend that has a maiden, 21 year old mare she will be 22 next year when she breeds her. She has been told live cover is her best chance for pregnancy because of the mares age. What is your opinions on this? She would like to try for the mares replacement.
AI - when correctly performed - exceed live cover pregnancy rates. In particular, with an older mare, a minimum contamination AI breeding is likely to produce a greater chance of pregnancy than LC.
Having said that, a maiden mare of this age is likely to present various problems that require attention to increase the likelihood of pregnancy - not the least being to ensure that the cervix relaxed adequately when she is in estrus; and treatment of delayed uterine clearance issues with an oxytocin protocol (older mares are more likely to have DUC issues).
Start with a good quality breeding soundness examination performed by a veterinarian that specializes in equine reproduction - preferably a theriogenologist.
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