Equine Breeding Management Flashcards
What type of reproductive cycle do mares have?
Seasonal polyoestrus
How many days between each ovulation?
21 days
Name 5 signs of oestrus in the mare during teasing?
- Squirting urine
- Squatting and raising tail
- Winking
- Quiet, calm and interested in stallion
- Nuzzling
What does palpation per rectum assess in a mare?
- Cervical and uterine tone
2. Follicular size and firmness
During luteal phase with the high progesterone what would palpation reveal?
Prominent uterine tone.
Closed cervix
If we were to palpate per rectum during follicular phase with high oestrogen and low progesterone what would be felt?
Soft uterine tone
Relaxed open cervix
What 4 things can a transrectal ultrasound tell us?
- Presence of CL
- Follicular size, shape and echogenicity
- Endometrial odema
- Pathology (uterine fluid, endometrial cysts)
During which oestrus stage is uterine odema present?
Oestrus
What 5 methods of oestrus cycle control are used in mares?
- Shorten CL lifespan
- Oestrus suppression
- Oestrus synchronization
- Ovulation induction
- Vernal transition manipulation
What drug is given to shorten the CL lifespan?
Prostaglandin
Name 2 ovulation induction agents used in mares.
- Human chorionic gonadotropin (hCG)
2. GnRH analogue Deslorelin
What hormone is used to suppress oestrus in mares to stop unwanted behavior?
Progesterone
What surgical intervention can be used to suppress oestrus?
Ovariectomy
What is given to synchronize oestrus in mares?
Progesterone
Estradiol
Prostaglandin
How long is frozen semen viable for?
18-24hrs
