BCSE Theriogenology and Veterinary Reproduction 2

Question 1

According to the Society for Theriogenology minimum standards, what is the minimum acceptable progressive motility for a bull to pass a breeding soundness evaluation (BSE)?

Accepted Answer

40%

Answer

20%

Answer

30%

Answer

50%

Question 2

Which method is considered the gold standard for early pregnancy diagnosis in cattle?

Accepted Answer

Transrectal ultrasonography at day 25–28

Answer

Rectal palpation at day 25

Answer

Serum progesterone at day 21

Answer

Milk progesterone at day 18

Question 3

Which sperm morphological defect is classified as a MAJOR defect and would reduce a bull's BSE score?

Accepted Answer

Proximal cytoplasmic droplets

Answer

Distal cytoplasmic droplets

Answer

Slightly bent midpiece

Answer

Minor head shape variation

Question 4

The CIDR (Controlled Internal Drug Release) device used in cattle contains which hormone?

Accepted Answer

Progesterone

Answer

Estradiol

Answer

GnRH

Answer

Prostaglandin F2α

Question 5

What is the primary cause of freemartinism in cattle?

Accepted Answer

Vascular anastomosis between twins of opposite sex sharing testosterone

Answer

Chromosomal trisomy in the female twin

Answer

Nutritional deficiency during gestation

Answer

Infection with Brucella abortus in utero

Question 6

Which progesterone concentration on day 4 post-LH surge (day 4 of diestrus) best confirms successful luteinization in the bitch?

Accepted Answer

>10 ng/mL

Answer

>2 ng/mL

Answer

>5 ng/mL

Answer

>20 ng/mL

Question 7

In the ewe, the breeding season is primarily regulated by:

Accepted Answer

Decreasing day length (short-day breeder)

Answer

Increasing day length (long-day breeder)

Answer

Temperature changes alone

Answer

Pheromone exposure from rams only