Impregnation breeding dating
All horses should be examined for twins with transrectal ultrasound.
Your veterinarian can perform transrectal ultrasound as soon as Day 26 of gestation to visualize a heartbeat and confirm fetal viability.
If the mare aborts her pregnancy around Day 40-45 or after, it is unlikely she can get pregnant again the same breeding season anyway.
Day 60 – elective examination that has no specific reason, but has become more important since the advent of fetal sexing.
Be mindful of automatic water supplies and ice-covered troughs during the winter months.
Herpesvirus (EHV-1) can cause late-term abortion and mares should be vaccinated for this disease preferably at five, seven, and nine months of gestation.
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Ascarid impaction was a common cause of colic and death in foals before the use of ivermectin became common.