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Breeding Exam > All Assorted > Flashcards

All Assorted Flashcards

1
Q

What are two functions of the follicle on the ovary ?

A

1.Contains the ovum
2.Produces estrogen

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2
Q

What is the ovum caught by ? Where is it directed to? And how long does it survive ?

A

Caught by the - Fimbria
Directed into the - Oviduct
Will survive for - 12 hours

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3
Q

During diestrus the follicle on the ovary has been replaced by what? And what hormone does it produce?

A

Replaced by the - Corpus Luteum
And produces progesterone

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4
Q

If the mare is not pregnant in the final days of diestrus what hormone is released? And what is destroyed?

A

PGF2a is released
And the CL is destroyed

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5
Q

What is the natural peak time for conception in mares ?

A

Summer solstice

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6
Q

The hormone GnRH stimulates is what ?

A

The pituitary gland

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7
Q

What do the follicles secrete when they reach 20-25 mm?

A

Estrogen

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8
Q

If no embryo is present in the uterus at the end of this 12-15 day period the uterine endometrium secretes what??

A

Prostaglandin (PGF2a)

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9
Q

What destroys the CL which is producing progesterone?

A

PGF2a

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10
Q

Without________ to act as a inhibitor the FSH levels rise , and the estrous cycle repeats itself

A

Progesterone

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11
Q

List one factor that relates to poor reproduction efficiency in horses

A

Seasonal occurrence of estrus

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12
Q

What are the 2 aspects of reproductive management

A
  1. Detection of estrus
  2. Mating management
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13
Q

List 2 methods of teasing

A
  1. Pen or stall
  2. Tease wall
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14
Q

What insemination timeline leads to highest conception rates?

A

36 hours before and up to ovulation

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15
Q

List 2 factors that affect spermatogenesis is the stallion

A
  1. The hormone testosterone
  2. Daylight length
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16
Q

List one venereal disease found in horses

A

Contagious equine metritis

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17
Q

List 2 components of a breeding soundness exam

A
  1. Medical history of the stallion
  2. Medication history
  3. Behaviour history
18
Q

List 4 methods of semen collection

A
  1. Condom
  2. Pharmacologically induced
  3. Use of an AV
  4. Manual Manipulation
19
Q

What is the normal internal temperature range of the AV?

A

44c to 48c fill at 50c

20
Q

List one advantage of pasture breeding

A

High conception rates

21
Q

List one disadvantage of pasture breeding

A

Risk of injury to stallions and mares is greater

22
Q

List one advantage of hand breeding

A

Increased control of stallion and mares resulting in fewer injuries

23
Q

List one disadvantage of hand breeding

A

Increased labour

24
Q

List one function of the semen extender

A

Increase the volume of the ejaculate

25
Q

What is the most common ingredient found in semen extenders

A

Milk based

26
Q

How many progressively motile Sperm should be inseminated in the mare and at what concentration/ml?

A

500 million and 25-50ml

27
Q

How many progressively motile sperm are standard does for shipped semen

A

1 billion and 25-50ml

28
Q

Most stallions that are considered “good coolers” will still have at least ___% to ___% of the initial Sperm motility after 24 hrs of cooling

A

40% to 50%

29
Q

Semen is generally ordered when a follicle ___ mm to ___mm in diameter is first detected

A

35mm to 40mm

30
Q

In order to help ensure that ovulation occurs within 24 to 48 hours after insemination mares are commonly administered either ________ or ______________________

A

Desorelin or Human Chorionic Gonadotropin (hcg)

31
Q

A minimum of ____% progressively motility should be present post thaw for a stallion considered a “good freezer”

A

30%

32
Q

List one common purpose for embryo transfer

A

To produce more that one foal in a season from a particularly valuable mare

33
Q

Is embryo collection a surgical or non surgical procedure?

A

Non surgical

34
Q

What is a intracytoplasmic sperm injection

A

A micro injection of a single sperm into the cytoplasm of a mature oocyte

35
Q

One benefit of line breeding

A

Concentrates on desirable traits

36
Q

List one drawback of line breeding

A

Also concentrates on undesirable traits

37
Q

What % of blood is contributed by an ancestor in the 3rd generation

A

12.50%

38
Q

What is linecross

A

Line cross is a line bred individual from one family crossed with a line bred individual from another family

39
Q

A lighting program that supplies ___ hours of light to __ hours of dark provide best results for stimulation of the estrous cycle

A

16 & 8 hours

40
Q

3 methods for pregnancy determination

A
  1. Palpation
  2. Ultrasound
  3. Observation

Breeding Exam (7 decks)

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