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Equine Reproduction > Pregnancy > Flashcards

Pregnancy Flashcards

1
Q

What is placentation?

A

development of extra embryonic membranes or placenta

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2
Q

_____ - development of extra embryonic membranes or placenta

A

Placentation

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3
Q

In placentation fertilized ovum migrates ____ days after fertilization, the ovum then moves to _____

A

6; one of the uterine horns

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4
Q

Development of the placenta is slow, it takes about _____ to complete

A

150 days

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5
Q

Early in pregnancy a yolk sac is formed which then becomes the _____

A

placenta

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6
Q

Early in pregnancy a _____ is formed which then becomes the placenta

A

yolk sac

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7
Q

How many membranes are in the fetal placenta? What are they?

A

3; chorion, allantois, amnion

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8
Q

What is the chorion?

A

Outer membrane covered with villi

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9
Q

____ - outer membrane covered with villi

A

chorion

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10
Q

What is the allantois?

A

second membrane lines the inside of the chorion

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11
Q

_____ - second membrane lines the inside of the chorion

A

allantois

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12
Q

What is the amnion?

A

inner membrane fused with the allantois, forms a “water bag” or allantoic cavity

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13
Q

_____ - inner membrane fused with the allantois, forms a “water bag” or allantoic cavity

A

amnion

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14
Q

Allantoic cavity fills with more fluid than the _____

A

amniotic cavity

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15
Q

Where are umbilical arteries and veins located? What does is carry?

A

In the connective tissue between allantois and chorion; carries unoxygenated blood and waste from fetus to mare

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16
Q

Blood of the fetus does not mix with _____

A

maternal blood

17
Q

About day 36 of pregnancy the _____ invade the endometrium, these cells multiply and become _____

A

chorionic girdle cells; endometrial cups

18
Q

Cup cells secrete _____ (_____), stimulates E2 production from CL

A

eCG (equine chorionic gonadotropin)

19
Q

Endometrial cups are most active from day _____ of pregnancy

A

55-65

20
Q

By day _____ the cups are sloughed off due to an immune response by the mare

A

120-150

Equine Reproduction (3 decks)

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