BCSE Theriogenology and Veterinary Reproduction

Question 1

In the bitch, serum progesterone concentrations above 5 ng/mL typically indicate which reproductive event?

Accepted Answer

Ovulation has occurred

Answer

Proestrus onset

Answer

LH surge

Answer

Anestrus

Question 2

Which stage of the canine estrous cycle is characterized by vaginal cornification >80% and a marked decrease in neutrophils on cytology?

Accepted Answer

Estrus

Answer

Proestrus

Answer

Diestrus

Answer

Anestrus

Question 3

In cattle, the corpus luteum (CL) can be lysed using exogenous prostaglandin F2α (PGF2α) between which days of the estrous cycle?

Accepted Answer

Days 5–16

Answer

Days 1–4

Answer

Days 17–20

Answer

Days 1–20

Question 4

What is the average gestation length of the mare?

Accepted Answer

335–345 days

Answer

270–280 days

Answer

300–340 days

Answer

360–380 days

Question 5

Which feline reproductive characteristic distinguishes cats from dogs in terms of ovulation?

Accepted Answer

Cats require mating or cervical stimulation to ovulate (induced ovulation)

Answer

Cats are spontaneous ovulators

Answer

Cats ovulate only once per year

Answer

Cats have a 21-day estrous cycle like cattle

Question 6

A cow presents with a soft, fluid-filled uterus and bilateral enlarged uterine horns at 4 weeks post-calving. The most likely diagnosis is:

Accepted Answer

Pyometra

Answer

Hydrometra

Answer

Mummified fetus

Answer

Mucometra

Question 7

In equine reproduction, the hormone primarily responsible for maternal recognition of pregnancy and CL maintenance is:

Accepted Answer

Equine chorionic gonadotropin (eCG)

Answer

Estrogen

Answer

Progesterone from accessory CLs

Answer

Oxytocin