Equine therio

Question 1

When are Mares actively cycling (which par of the year)?

Answer 1

April - October (Long day breeders)

Question 2

Estrous cycle length

Answer 2

21 days

Question 3

Length of estrus

Answer 3

3 - 12 days (avg 7 days)

Question 4

When do mares ovulate during estrus?

Answer 4

the last 24 - 48 hours of estrus
Estrogen - from preovulatory follicle
Uterine edema

Question 5

What is the length of diestrus in the mare?

Answer 5

14 - 15 days
Progesterone - tone uterus
CL not palpable

Question 6

When are progestins effective to advance the breeding season in the mare?

Answer 6

Late transition period

Question 7

What percentage of mares that are healthy will cycle all year round?

Answer 7

25%

Question 8

What are the requirements for shipping semen into Washington state?

Answer 8

Current coggins test health certificate (EIA neg)
Neg EVA from current year/proof of vaccination
Semen permit # (issued by USDA)
Semen evaluation paperwork

Question 9

What is the best breeding management technique for live cover?

Answer 9

In-hand mating and at the most breed mare only once (so monitor follicular growth)

Question 10

How long after giving GnRH or hCG to a mature follicle mare does she ovulate?

Answer 10

36-48 hours

GnRH (Deslorelin oil base)

Question 11

When is the mare pregnancy dependent on the placenta to maintain pregnancy with progesterone?

Answer 11

after 100 days