Exam 1: Maternal Recognition of Pregnancy

Question 1

The major consequence of maternal recognition of pregnancy

is to prolong the period of function of the _____ _____

Answer 1

corpus luteum

Question 2

What are the 2 major strategies involved in

maternal recognition of pregnancy?

Answer 2

Anti-luteolytic = diversion/inhibition of PGA2a

or

Luteotrophic = maintainance of the CL

Question 3

How does maternal recognition of pregnancy

occur in cows?

Answer 3

Interferon-tau (IFNt) inhibits oxytocin receptors and PGF2a

(anti-luteolytic)

Question 4

How does maternal recognition of pregnancy

occur in pigs?

Answer 4

Blastocyst produces estradiol

which diverts PGF2a from the blood to the uterine lumen

where it is inactivated

(anti-luteolytic)

Question 5

How does maternal recognition of pregnancy

occur in horses?

Answer 5

Unknown mechanism of PGF2a suppression

(anti-luteolytic)

Question 6

Transportation of the embryo through the uterus

is mediated by

Answer 6

PGE2 (prostaglandin E2)

Question 7

The embryo capsule is a unique feature in this species

Answer 7

horses

Question 8

The embryo stops migrating at Day 16 post-ovulation

and becomes fixed at the base of one uterine horn.

The ________ side is favored by

maiden and barren mares

Answer 8

RIGHT

Question 9

Almost all pregnancies in llamas are in the

________ uterine horn

even though they ovulate from both sides.

Answer 9

LEFT