Hormone Manipulation Review Questions

You have just been hired to manage the broodmare barn on a large Arabian farm. Below are the records for the barren mares for this year. Your predecessor was not very good at keeping records so you don't have any other records. Your Boss doesn't understand anything about reproduction and expects you to handle everything.

Mare #

1
15
1
16
1
17
1
18
1
19
1
20
1
21
1
22
1
23
1
24
1
25
1
26
1
27
1
28
1
29
1
30
1
31
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
2
10
2
11
Comments
101
C
C
C
C
C
C
C
C
H
H
H
H
H
H
H
H
H
H
H?
H
H
H
H
H?
H
H
H
C
104
H
H
H
H
H
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
H?
H
H
H
H
H
C
C
on lights-12/1
105
C
C
C
C
C
C
C
C
C
C
C
C
H?
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
stallion in pen 1/15
109
H
H
H
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
stallion in pen 1/15
117
C
C
C
C
C
C
C
H
H
H
H
H
H
H
C
C
C
C
C
C
C
C
C
C
C
C
C
C
on lights-12/1
121
C
C
C
C
C
C
H
H
H
H
H
H
C
C
C
C
C
C
C
C
C
C
C
C
C
C
H
H
on lights-12/1
126
C
C
C
C
C
C
C
C
C
C
C
C
C
H
H
H
H
H
H
H
C
C
C
C
C
C
C
C
on lights-12/1
211 C C C C C C C C C C C C C C C C C C C C C C C C C C C C
232 H H H H H H H C C C H H H H H H H C C C C C C C C C C C
stallion in pen 1/15

The vet came and did ultrasound exams on the following mares on 2/11.

Mare #
Rt ovary
L ovary
Uterus
101
12,15,18 mm follicles
many sm follicles
2.5 edema
109
CL
sm follicles
29mm spherical body: rt horn
121
22, 26, 28 mm follicles
15, 15, 30 mm follicles
2.0 edema, no fluid
232
21mm, 24mm follicles
15mm,20 mm follicles, CL
no edema

 

1. Mare 109 is to be bred to Aladdinn. How should she be managed (check all that are correct)?

Choice 1 Mare 109 is pregnant and should be aborted to be able to breed her to the correct stallion.
 Choice 2 Mare 109 needs to be treated with PGF 2a.
 Choice 3 Mare 109 needs to be treated with progesterone.
 Choice 4 Mare 109 should be coming into estrus in the next few days. She should be teased daily.

2. Which mares are anaestrual?
Choice 1 101, 211,232
 Choice 2 104,117,121
 Choice 3 105, 211
 Choice 4 109,121,211

3. Which mares are transitional?

Choice 1 101
 Choice 2 104, 126
 Choice 3 211,232
 Choice 4 117,121, 109


4. Which mares are cycling normally?
Choice 1 104,126
 Choice 2 117,121
 Choice 3 105,109
 Choice 4 211,232

5. Semen from Saud El Ameer has been ordered to breed Mare# 126 to be delivered on 2/25 (this is the only day available for the season). How will you manage this mare?
Choice 1 PGF2a on 2/19, HCG on 2/24
 Choice 2 PGF2a on 2/11, HCG on 2/24
 Choice 3 Everything will be OK, just breed when the semen comes.
 Choice 4 There is no way to have the mare ready , reorder the semen for another stallion.

6. Mare # 121 is to be bred to Bask. When should you order the semen from the stallion barn (fresh semen)? How should you manage the mare?
Choice 1 Order semen for 2/17, PGF2a on 2/13
 Choice 2 Order semen for 2/14, HCG on 2/13
 Choice 3 Order semen for 2/14, PGF2a on 2/13

7. Mare # 101 is to be bred to Bask. How can you manage the mare to breed as soon as possible?
Choice 1 Give mare # 101 estrogen for 3 days to keep her in heat and then remove so she will ovulate.
Choice 2 Give mare #101 PGF2a to get her to cycle normally
 Choice 3 Give mare #101 progesterone for 10-14 days. She should begin to cycle regularly since she had some follicles initially.
 Choice 3 There is nothing you can do with mare #101

8. Mare #211 is to be bred to Aladdinn. How should you manage her to breed as soon as possible?
Choice 1 Give mare#211 estrogen to bring her into estrus.
 Choice 2 Give mare #211 PGF2a to get her to cycle normally
 Choice 3 Give mare #211 progesterone for 10-14 days. She should begin to cycle regularly
 Choice 4 Mare #211 is anaestrual, there is nothing you can do until she begins to have follicular development
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