Lect 4

Question 1

What is the typical age determination for puberty in dogs and cats?

Answer 1

75% of adult body weight

Females mature sooner than males

Question 2

What is happening during anestrus?

Answer 2

quiescent period for rest and repair

Question 3

What is happening during Proestrus?

Answer 3

Follicle development

Question 4

What is happening during Estrus?

Answer 4

Oocyte maturation and ovulation

Question 5

What is happening during Diestrus?

Answer 5

Luteal period

Question 6

What is Inter-estrus?

Answer 6

The interval average range between two estrus (4.8 - 18)

Question 7

What is the Progesterone levels during Anestrus?

Answer 7

0.2 - 1 ng/ml

Question 8

What is the Progesterone levels during Proestrus?

Answer 8

0.2-1 ng/ml

Question 9

What is the Progesterone levels during the LH surge?

Answer 9

1.5 - 1.8

Question 10

P4 during Ovulation?

Answer 10

4 - 6 ng/ml

Question 11

Fertilization period P4?

Answer 11

12 - 16 but the range is wide

Question 12

P4 at Cervical closure?

Answer 12

20+

Question 13

Diestrus early and late P4?

Answer 13

20 - 40 then 40 - 10

Question 14

Pregnancy loss P4?

Answer 14

<5 - 10

Question 15

Labor onset in 8 - 24 hrs P4?

Answer 15

<2

Question 16

Termination of pregnancy P4?

Answer 16

<1

Question 17

What is the LH surge most useful for?

Answer 17

Accurately aging a fetus

Question 18

How long after the LH surge is there ovulation?

Answer 18

2 to 3 days after the surge

Question 19

When progesterone is 1 to 2 ng/ml, when will the LH surge happen?

Answer 19

Just happened or is about to happen (-1 day to 0 days)

Question 20

How long after the LH surge does fertilization occur?

Answer 20

4 to 6 days

Question 21

How long after the LH surge is parturition?

Answer 21

65 days

Question 22

How long can intrauterine sperm stay non-capacitated?

Answer 22

9 - 11 days

Question 23

What is required by the sperm in order for it to fertilize the egg?

Answer 23

capacitation

Question 24

How long does the sperm survive after capacitation?

Answer 24

1 day

Question 25

If a dog has just started with bloody discharge and started licking her vulva 5 days ago, the owner wants to breed accurately as possible, what is the next step?

Answer 25

Vaginal cytology to see if she is in proestrus.
Draw blood, spin down and FREEZE. Keep doing this until the cytology begins to show estrus or for a few more days then run progesterone test.

Question 26

When should breeding occur in relation to the LH surge?

Answer 26

4 days after the LH Surge

Question 27

Where is the most common source of blood in semen?

Answer 27

The surface of the penis

Question 28

How can you check to see if there is infection?

Answer 28

RBC to WBC ratio, if there are more WBC than RBC an infection is likely

Question 29

If you have Thawed frozen semen, when do you need to breed?

Answer 29

5 - 6 days after LH Surge

Question 30

So for these more expensive breeding’s you might want to do a P4 and what else?

Answer 30

LH serum to get an accurate time of the LH surge

Question 31

When do you do transcervical insemination?

Answer 31

When you are inseminating with thawed frozen semen.

Question 32

What is the time frame of function for:

1. Fresh/chilled semen in vagina -
2. Fresh semen in uterus -
3. Chilled semen in uterus -
4. Thawed frozen semen in uterus-

Answer 32

1. 4 - 5 hr (vagina)
2. 9 - 11 days
3. 1 - 2 days
4. < 1 day

Question 33

How long after the LH surge do you breed by natural cover?

Answer 33

3 - 5 days and breed every other day for a week

Same for chilled semen.