AAVSB Reproductive Medicine and Theriogenology 3

Question 1

When performing artificial insemination (AI) in cattle using the recto-vaginal technique, semen should be deposited at which anatomical site?

Accepted Answer

Body of the uterus

Answer

In cattle AI, the semen is deposited in the body of the uterus (uterine body) after navigating the cervix, providing the best conception rates.

Question 2

What is the recommended storage temperature for extended chilled equine semen during transport?

Accepted Answer

4–5°C

Answer

Extended chilled equine semen should be stored and transported at 4–5°C to slow metabolic activity and maintain sperm viability for up to 24–48 hours.

Question 3

According to Society for Theriogenology (SFT) breeding soundness evaluation standards, what is the minimum percentage of morphologically normal sperm required for a bull to receive a 'satisfactory' classification?

Accepted Answer

70%

Answer

SFT standards require at least 70% morphologically normal sperm, along with ≥30% progressive motility and a minimum sperm concentration, for a bull to be classified as a satisfactory potential breeder.

Question 4

Which synchronization protocol for timed AI in cattle uses two injections of GnRH separated by a PGF2α injection?

Accepted Answer

Ovsynch

Answer

The Ovsynch protocol consists of GnRH on day 0, PGF2α on day 7, a second GnRH on day 9, and timed AI approximately 16–20 hours later, synchronizing ovulation for fixed-time insemination.

Question 5

In which domestic species is commercial embryo transfer (ET) most widely practiced, with tens of thousands of procedures performed annually?

Accepted Answer

Cattle

Answer

Cattle embryo transfer is the most commercially developed ET program worldwide, driven by the high value of elite genetics and well-established non-surgical transfer protocols.

AAVSB - American Association of Veterinary State Boards Practice Test

AAVSB - American Association of Veterinary State Boards Practice Test

AAVSB Reproductive Medicine and Theriogenology 3