events of the fetal period

8 weeks

first brain wave

liver forms blood cells

webbed digits separate

when does ossification and weak muscle contractions occur?

8 weeks

when is the cardiovascular system fully functioning?

8 weeks

9 -12 weeks ( 3 months)

brain enlargement, spine/eye form

liver: bile secretion

lungs develop: amniotic fluid

skin, facial features, and palate

when can a heart beat be heard externally and the sex be determined?

9-12 weeks ( 3 months)

how long is a baby at 9-12 weeks (3 months)

3.5 inches

13-16 weeks (month 4)

cerebellum, sensory organs, eye movement

body is bigger than the head

bones and joints

how long is the baby at month 4

5.5 inches

17 - 20 weeks ( month 5)

vernix caseosa and lanugo

fetal position

fetal movement felt

how long i sthe baby at month 5 ( 17-20 weeks)

7.5 inches

21- 30 weeks (month 6 and 7)

may survive premature birth

spinal cord myelination

finger/toenails

blood cell formation

testes descend in men

baby length at month 6 and 7

11 inches

30-38 weeks (month 8 and 9)

fat accumulates, skin thickens

14 inches and 7 lbs