MRP and Placentation

Question 1

What type of placenta (w/# of layers) do mares, sows, and camelids share?

Answer 1

Diffuse, Epitheliochorial
(6)
almost entire surface of allantochorion is involved in formation of placenta

Question 2

How does IFN-tau stop the release of PGF2-alpha influence MRP in ruminants?

Answer 2

It inhibits formation of OxyT Receptors! —> immune response that inhibits these receptors, which stops the release of PGF2-alpha

Question 3

What are the requirement(s) for MRP in sows?

Answer 3

4 conceptuses; 2 in each horn

Question 4

What phase does pyometra occur in the bitch?

Answer 4

Pseudopregnant/diestrus phase

Question 5

What type of placenta (w/# of layers) do the cow, ewe, doe, and deer share?

Answer 5

Cotyledonary, Epitheliochroial

multiple discrete areas of attachment called cotyledons are formed by interaction of patches of allantochroion w/endometrium..

Cotyledon (fetus) + Caruncle (cow)= complex called placentome

(6)

Question 6

What type of placenta (w/#of layers) do bitches, queens, and ferrets share?

Answer 6

Zonary, ENDOtheliochorial
(5)

*placenta takes the form of an in/-complete band of tissue surrounding fetus

also seen in other carnivores: bears, seals, elephants*