I recommend setting cameras up in your stalls if you stall your mares at night. Buy small tvs and put them in your house so you can mare stare from your house. I have 40-50 miniature foals each year so I know how tiring staying up all night every night can be. I also know how expensive having a vet out at your farm can be, especially if your mare doesn't foal that night. If I were you I would call and make sure your vet will be on call if you have an emergency or if she goes into foal. Most mares will give birth just fine their first time since they do have natural matural instincts but I would most definitely recommend getting cameras and small tvs to watch your mares.
-Bridget
-Bridget