It's been about two years since I've looked into using P&E starting on the day of foaling, to lengthen the time between foaling and foal heat. Is it still an acceptable practice or is there new information out there that is frowning on it?
One can use it, but remember that progestagens do have the tendency to close down the cervix, which may not be desirable post-foaling. We have certainly used it with success, but we have also used estrogen alone on about day 7 or 8 post foaling (estradiol cypionate is the typical choice) to delay an ovulation past 10 days. So - if you have a mare that is notorious for post-foaling ovulations within 7 or 8 days after foaling, P&E might be best, but if your mare usually ovulated day 9-12 ECP could help.
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