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OB/GYN > Embryology > Flashcards

Embryology Flashcards

0
Q

Embryo becomes fetus

A

10 weeks

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1
Q

What gestational age do kidneys develop

A

Week 12-14

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2
Q

Absent nasal bone

A

Assoc with tri 21, small nose, tricuspid regurgitation, aneuploidy

11-14weeks

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3
Q

Fertilization occurs in ____ 1-2 days after ovulation

A

Ampulla

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4
Q

Sperm + ovum =

A

Zygote

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5
Q

3 days

A

16 cell morula

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6
Q

____ enter uterus 4-5 days

A

Blastocyst

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7
Q

Outer ____surrounds fluid filled cavity ____ and inner cell mass _____

A

Trophoblast
Blastocele
Embryoblast

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8
Q

____ occurs 7-9 days as blastocyst burrows beneath endometrium

A

Implantation

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9
Q

Endometrium. 3 layers.

A

Decidua capsularis
Decidua Vera
Decidua basalis: maternal contribution to placenta

Double sac: early sign of pregnancy. Decidua Vera & chorionic villi

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10
Q

Conceptus contribution to placenta

A

Chorion frondosum

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11
Q

3 germ cell

A

Endoderm
Mesoderm
Ectoderm

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12
Q

Folding/fusion of neural tube

A

23 days

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13
Q

C shape, limb buds, ❤️prominence, tail

A

28 days

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14
Q

Embryo well formed. Digits, tail absent, gut herniation, large head.

A

56 days

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15
Q

Facial folds fuse

A

6 weeks

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16
Q

YS resorbs

A

12 weeks

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17
Q

Amnion & chorion fuse

A

14-15 weeks

18
Q

Sac ID

A

5 weeks

Double sac sign

19
Q

YS ID

A

5.5 weeks

20
Q

Embryo seen at

A

6 weeks. Grows 1-2mm/day

21
Q

❤️ beats at

A

5.5 weeks

22
Q

First organ to function

A

❤️

Should ID ❤️ beat when CRL > 4 mm

23
Q

Limb buds

A

7-8 weeks

24
Q

Rhombencephalon

A

8-11 weeks

25
Q

Amnion ID up to

A

16-17 weeks

26
Q

Gut herniates

A

8-12 weeks

27
Q

Spine parallel lines at

A

8 weeks

28
Q

Cerebral hemispheres & choroid plexus at

A

9 weeks

29
Q

Digits

A

11 weeks

30
Q

Fetal period begins

A

10 weeks

31
Q

Second trimester

A

13-26 weeks

32
Q

Third trimester

A

27-42 weeks. (40 weeks term)

33
Q

Spine vertebrae ID

A

16 weeks. Trvs imaging is gold standard.

34
Q

Kidneys ID

A

15-17 weeks

Pelvis should be < 1 cm after 30 weeks.

35
Q

Genitalia error rate

A

3%

36
Q

Cervical length incompetent length

A

< 3cm

50-75% of image. Perpendicular.

37
Q

AFI

A

Uterus should be above umbilicus. Done at > 20 weeks. 4 quads.
Normal = 8-22cm
Oligohydramnios = < 5cm
Polyhydramnios = > 22cm

38
Q

Viability age

A

24 weeks

39
Q

Callen best ❤️ images

A

20-22 weeks

40
Q

Lungs mature

A

37 weeks

41
Q

Pelvis AP < 1 cm at

A

30 weeks

42
Q

Bladder changes every

A

Hour

OB/GYN (32 decks)

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