Lecture 2 Equine

Question 1

• Undesirable reproductive behavior in performance

mares

Answer 1

 Estrus poor performance
 Cyclicity related tying up
 Nymphomania
 Aggressive behavior
 Male-like behavior

Question 2

Equine contraception

Answer 2

• Responsible ownership
• Ovariectomy
• Other surgical techniques
• Immunization against GnRH: very good
option (not yet approved in the US)

Question 3

• Causes of poor performance during estrus

Answer 3

 Pain at ovulation (ovarian hematoma or large follicles)
 May be very colicky
• Other differentials
 Vaginitis
 Cystitis

Question 4

• Methods for elimination of estrus behavior

Answer 4

Progestogens
–Altrenogest (0.044 mg/kg)
–Progesterone (0.2 mg/kg)