Pregnancy recognition

Question 1

What animal does not have counter current mechanism to deliver PGF2alpha to the ovary

Answer 1

Horse

Question 2

What is the maternal recognition hormone in the cow

Answer 2

INF-t

Question 3

What must occur for pregnancy to contenue

Answer 3

prevention of luteolysis

Question 4

What hormone is required to maintain uterine quiescence

Answer 4

Progesterone

Question 5

Hormone responsible for destruction of CL

Answer 5

Prostaglandin F2alpha

Question 6

What causes the synthesis of oxytocin receptors

Answer 6

estrogen

Question 7

What blocks synthesis of oxytocin receptors

Answer 7

progesterone

Question 8

What does oxytocin binding stimulate

Answer 8

prostaglandin F2alpha release

Question 9

What species have CL as the only source of progesterone

Answer 9

Pig
Goat
LLama
Dog
Cat

Question 10

What species have both CL and placental production of progesterone

Answer 10

Horse
Sheep
Cow

Question 11

What happens to CL lifespan if uterus is removed

Answer 11

Lifespan is same as gestation length

Question 12

CL lifespan with contralateral uterus removal

Answer 12

no change

Question 13

CL lifespan with ipsilateral uterus removal

Answer 13

CL lifespan is longer than normal

Question 14

How does PGF2alpha travel in a normal animal

Answer 14

counter current exchange

Question 15

How does PGF2alpha travel in a horse

Answer 15

systemically

Question 16

What is the maternal recognition of pregnancy in the horse

Answer 16

Movement of conceptus

Question 17

What is the maternal recognition of pregnancy in the cow/pig

Answer 17

expansion

Question 18

What does INF-t do

Answer 18

Bind to endometrium

Block synthesis of estrogen/oxytocin receptors

Question 19

When does conceptus produce estradiol in the pig

Answer 19

11 day post ovulation

Question 20

What is the conceptus derived signal in the mare

Answer 20

Not identified

Question 21

Maternal recognition of the dog

Answer 21

No signal needed

CL is maintained