developmental milestones Flashcards
3 weeks
heart starts beating and blood circulates
yolk sac initiates primitive hematopoiesis
4 weeks
development into 4-chamber heart
respiratory system begins forming
5 weeks
umbilical cord has completely developed
8 weeks
gender now distinguishable
heart fully developed
9 weeks
fingers, toes, eyelids, and jaw evident
12 weeks
placenta and organ systems are complete
11 weeks
fetus urination in amniotic fluid
16 weeks
meconium is found in bowels
20 weeks
quickening
baby’s hearing is developing
lanugo covers the body
circadian rhythm evident
vernix caseosa appears
24 weeks
viable circulation
rapid brain growth
hiccups
Lecithin present for L/S ratio
vernix caseosa thickens
6 weeks
hematopoiesis starts from fetal liver
28 weeks
eyes open and close
processes sights and sounds
taste buds developing
hair on the head
32 weeks
nails and finger print present
subcutaneous fat develops
vigorous fetal movement
L/S ratio 1.2:1
36 weeks
lanugo disappearing
amniotic fluid decreases
L/S ratio 2:1
40 weeks
complete fetal development
