Exam 1 - Embryo & Fetus Stage

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Last updated 1:37 PM on 9/9/26
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22 Terms

1
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5 Week Embryo

Not seen sonographically

C-shaped

Forebrain prominence

Tail

<p>Not seen sonographically</p><p>C-shaped</p><p>Forebrain prominence</p><p>Tail</p>
2
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Yolk Sac

Needed to confirm pregnancy

Round + smooth walls

Located between amnionic and chorionic membranes

<p>Needed to confirm pregnancy</p><p>Round + smooth walls</p><p>Located between amnionic and chorionic membranes</p>
3
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The yolk sac must be seen by...

5 weeks

MSD 8 mm

hCG 3000 mlU/ml

4
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Double Bleb Sign

Amnion and yolk sac seen as two bubbles

<p>Amnion and yolk sac seen as two bubbles</p>
5
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Week 6

Prominent brain development

Embryo seen with yolk sac and fetal pole

Heart beating

C-shaped embryo

<p>Prominent brain development</p><p>Embryo seen with yolk sac and fetal pole</p><p>Heart beating</p><p>C-shaped embryo</p>
6
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Fetal Pole should be seen by...

Week 6

MSD 2.5 cm

<p>Week 6</p><p>MSD 2.5 cm</p>
7
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Fetal heart tones should be seen by...

Week 6

CRL 7 mm

8
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Week 7

C-shaped embryo

Ear + eye development

Tail going away

Bulging heart

Single vesicle in brain

<p>C-shaped embryo</p><p>Ear + eye development</p><p>Tail going away</p><p>Bulging heart</p><p>Single vesicle in brain</p>
9
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Week 8

Large head

Brain hemispheres start to develop + has 3 brain vesicles

Spine straightens

<p>Large head</p><p>Brain hemispheres start to develop + has 3 brain vesicles</p><p>Spine straightens</p>
10
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When does midgut herniation begin?

Week 8

11
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Fetal limb buds should be seen by...

Week 8

12
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Week 9

All organs and main features present

Straight neck

Distinct cerebral hemispheres

<p>All organs and main features present</p><p>Straight neck</p><p>Distinct cerebral hemispheres</p>
13
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All brain ventricles should be seen by...

Week 9

14
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The falx and choroid plexus should be seen by...

Week 9

15
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Week 10

Unwebbed hands + feet

Brain completely formed

Eyelids formed

<p>Unwebbed hands + feet</p><p>Brain completely formed</p><p>Eyelids formed</p>
16
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The cerebellum should be seen by...

Week 11

17
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Week 12

Ossification of bones begins

<p>Ossification of bones begins</p>
18
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A 4 chamber heart should be seen by...

Week 12

19
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The stomach should be seen by...

Week 12

20
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When does midgut herniation end?

Week 12

21
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The bladder should be seen by...

Week 14

22
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The kidneys should be seen by...

Week 14