Most mares foal anywhere from 330 to 350 days after breeding, so monitor closely from December 16, 2026.
The second trimester (days 114 to 227) is a period of steady growth. Maintain good body condition score (5-6 out of 9) and confirm the EHV-1 booster schedule.
Your horse has approximately 140 days remaining. Individual mares can vary by 20+ days, so rely on physical signs as much as calendar math.
Next stepConsult your equine vet to confirm pregnancy by ultrasound and to tailor the vaccination and nutrition schedule to your mare.