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VPHY 143 > 10.1. Establishment of pregnancy > Flashcards

10.1. Establishment of pregnancy Flashcards

1
Q

Establishment of pregnancy of which animal?

The embryo is being transported here in the ipsilateral uterus.

This is the same side where the ovum is ovulated and fertilized.

A

COW

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2
Q

Establishment of pregnancy of which animal?

The zygote moves between the ipsilateral-contralateral uterus, eventually being implanted.

A

MARE

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3
Q

Establishment of pregnancy of which animal?

The blastocyst that was formed in the ipsilateral uterus would be implanted in the ipsilateral side. It means that if it is in the right ovary, and the right oviduct, the fetuses or the blastocyst would be implanted in the right uterine horn.

Same on the left side.

A

SOW (litter bearing animal)

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4
Q

Development of extraembryonic or fetal membranes:

in young embryos:
yolk sac: ____
allantois: ____

A

yolk sac: bigger
allantois: smaller

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5
Q

Development of extraembryonic or fetal membranes:

in older embryos:
yolk sac: ____
allantois: ____
amniotic cavity: ___
chorio-allantois: ____

A

yolk sac: smaller
allantois: bigger
amniotic cavity: smaller
chorio-allantois: placenta

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6
Q

Functions of fetal membranes:

this provides nutrients for embryo (early stage)

A

yolk sac

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7
Q

Functions of fetal membranes:

this protects fetus from injury, provides lubrication for parturition, reservoir for urine & waste

A

amnion

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8
Q

Functions of fetal membranes:

carries blood vessel of placenta reservoir for nutrients & wastes

umbilical cord - attaches fetus to allantois

A

allantois

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9
Q

Functions of fetal membranes:

this absorbs nutrients from uterus

allows maternal-fetal gas exchange

chorion + allantois = placenta

secretes hormones

A

chorion

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10
Q

(2) animals with animals with ENDOTHELIOCHORAL & ZONARY type of placenta

give their length of gestation

A
  1. bitch (64)**
  2. queen (65)
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11
Q

(2) animals with ENDOTHELIOCHORAL & DIFFUSE type of placenta

give their length of gestation

A
  1. mare (345)**
  2. sow (114)
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12
Q

(3) animals with SYNDESMOCHORIAL & COTYLEDONARY type of placenta

give their length of gestation

A
  1. cow (280)
  2. ewe (147)
  3. doe (147)
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13
Q

Types of placenta attachment:

chorion fuses to endometrium (ex. SOW)

A

Superficial

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14
Q

Types of placenta attachment:

embryo invades endometrium & develops in the endometrium

A

Interstitial

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15
Q

Types of placenta attachment:

outward attachment
(ex. LARGE ruminants)

A

Convex

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16
Q

Types of placenta attachment:

inward attachment
(SMALL ruminants)

A

Concave

17
Q

Attached cotyledons in maternal caruncles & blood vessels allow ____ to ____ communication

A

fetal - maternal

VPHY 143 (29 decks)

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