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Flashcards in Fetal Development Deck (49):
1

Organogenesis

Wk 8

2

Double chamber hearts visible

Wk 5

3

Heart begins to beat

Wk 2/ wk 3

4

Gender recognizable

Wk 12

5

Heart beating

Wk 5

7

Brain and spinal cord

Wk 2/ wk 3

8

Limb buds form

Wk 5

9

Eyelids begins to fuse

Wk 8

10

Face is well formed

Wk 12

11

Circulatory system through umbilical cord well established

Wk 8

12

Kidneys begin to form urine

Wk 12

13

Labia majora well developed

Wk 40

14

Blood circulation begins

Wk 2/ wk 3

15

Lung buds appear

Wk 2/ wk 3

15

Spontaneous movements occur

Wk 12

17

Lungs developed sufficiently to provide gas exchange

Wk 28

18

L/S ratio greater than 2:1

Wk 36

19

Limbs strong and slender

Wk 12

20

Testes in the scrotum

Wk 40

21

Lanugo hair begins to dvelop

Wk 16

23

Nails present

Wk 20

24

Fingernails extend beyond fingertips

Wk 40

25

Enamel and denting depositioning

Wk 20

26

Muscles dvelop

Wk 20

27

Skeletal ossification

Wk 16

28

Vernix caseosa decreases

Wk 40

29

Heartbeat by doppler

Wk 12
(10 to 12)

30

Skin reddish and wrinkled

Wk 24

31

Reflex hand grasp

Wk 24

32

Fetal skin transparent

Wk 16

34

Heartbeat by fetoscope

Wk 20

35

Fetus has ability to hear

Wk 24

35

Lecithin formation

Wk 28

36

Limbs well flexed

Wk 28

36

If born baby can breathe

Wk 28

37

Hair on head well formed

Wk 24

37

Bones fully developed

Wk 32

39

Skin is pink and body rounded

Wk 36

40

Lanugo covers entire body

Wk 20

41

L/S ratio 1.2/1

Wk 32

42

Skin less wrinkled

Wk 36

44

Lanugo in upper arms and shoulders

Wk 40

45

Active movements present

Wk 16

46

Eyelids open and close

Wk 28

46

Subcutaneous fat present

Wk 32

46

Lanugo disappearing

Wk 36

47

Brain developing rapidly

Wk 28

48

Sole (plantar) creases run down to the heel

Wk 40

49

Blastocyst free floating

Wk 1