Current Recommendations for Pregnant Mares

Pregnancy Diagnosis

• 15-18 days after her last breeding date, ultrasound your mare to confirm pregnancy and check for twins.
• 25-35 days after her last breeding date, ultrasound her again to check for fetal heartbeat or possible fetal loss (absorption).

Vaccinations

• 5 months – Pneumabort K booster AFTER confirming pregnancy one more time via rectal palpation. (If the mare has not been previously vaccinated with Pneumabort K, start at 3 months.)
• 7 months – Pneumabort K
• 9 months – Pneumabort K
• 10 months – (4-6 weeks before foaling) – Pre-foaling vaccinations, consisting of all annual vaccinations.

Nutrition

• Nutritional demands for pregnant mares do not increase until the last trimester of pregnancy.
• Nutritional and water requirements increase significantly with lactation.

Deworming

• Continue to deworm your mare every 8 weeks or keep her on a daily dewormer throughout gestation. We do not recommend the use of Quest during pregnancy.
• If not on a daily dewormer such as Strongid C2X , your mare should be dewormed the day of foaling, to prevent the transfer of threadworms to the foal through the mare’s milk.