2017 4h clinic - repro updates reproduction dr. kimberly cole february 25, 2017 ohio 4 ... •...
TRANSCRIPT
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Ohio 4‐H Horse Program www.horse.osu.edu
Equine ReproductionDr. Kimberly ColeFebruary 25, 2017
Ohio 4‐H Horse Program www.horse.osu.edu
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Ohio 4‐H Horse Program www.horse.osu.edu
Overview
• Responsible Horse Breeding• Reproductive Anatomy & Physiology of the Mare• Estrus Detection & Estrous Cycle Manipulation
• Artificial Insemination & Advanced Reproductive Techniques• Broodmare Management• The Foaling Process• Anatomy & Physiology of the Stallion
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Ohio 4‐H Horse Program www.horse.osu.edu
Responsible Horse Breeding
• Consider alternatives• Adopt from a non‐profit organization• Purchasing a horse that meets your specifications
• Calculate and compare costs• Breeding costs (stud fees, veterinary expenses, mare care, etc.)• Insurance• Yearly maintenance costs (foal to 3 yrs)
• Feed, housing, farrier, veterinary, etc.• Careful evaluation of the mare and stallion
• Conformation and temperament• Genetic testing
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Ohio 4‐H Horse Program www.horse.osu.edu
Options for Breeding Your Mare
• Live Cover
• Artificial Insemination
• Embryo Transfer
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Ohio 4‐H Horse Program www.horse.osu.edu
Gestation Length Average: 340 daysRange: 320‐355 days
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Ohio 4‐H Horse Program www.horse.osu.edu
Broodmare Management
• Vaccinations• Annual core vaccines
• WEE/EEE/WNV/Tetanus/Rabies• Recommended risk‐based vaccines• EHV at 5,7, & 9 months of gestation• Pre‐foaling vaccines at 300d of gestation
• Deworming• Nutrition
• Increased nutrient requirements in late gestation
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Ohio 4‐H Horse Program www.horse.osu.edu
Caution When Feeding Fescue
• Concern for late gestation mares• Causes decrease in prolactin, estrogen and progesterone
• Prolonged gestation• Thickened placenta• Dystocia• Agalactia• Weak/dead foals• Retained placenta• Decreased conception
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Ohio 4‐H Horse Program www.horse.osu.edu
3 Stages of Parturition (Foaling)
• Stage 1: Preparation
• Stage 2: Birth of the Foal
• Stage 3: Passage of the Placenta
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Ohio 4‐H Horse Program www.horse.osu.edu
Stage 1: Preparation
• Possible changes in behavior• Uterine contractions• Dilation of the cervix• Rotation of foal into normal delivery position
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Ohio 4‐H Horse Program www.horse.osu.edu
Stage 2: Birth of the Foal
Begins with rupture of the chorioallantoic membranes, commonly known as “breaking of the water”.
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Ohio 4‐H Horse Program www.horse.osu.edu
Red Bag Delivery
• Premature placental detachment• Red & velvety appearance• Membranes do not break• Lack of oxygen to foal
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Ohio 4‐H Horse Program www.horse.osu.edu
Stage 3: Passage of the Placenta
• Usually expelled within 1 hour• Considered ‘retained’ if not expelled
within 3 hours (Call the vet!)• Uterine contractions• Examine for holes, color & weight
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Ohio 4‐H Horse Program www.horse.osu.edu
The 1st 24 hours are crucial!
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Ohio 4‐H Horse Program www.horse.osu.edu
Ohio 4‐H Horse Program www.horse.osu.edu
The fun is just beginning!