fetal development Flashcards
pre-embryonic stage
0-14 days
embryonic stage
15 days to 8 weeks
fetal stage
week 9 - birth
when does cellular differentiation start?
embryonic stage
when is a baby most susceptible to teratogens
embryonic stage
is the fetal stage characterized by
growth & refinement in structure & function of all organs
when does quickening occur?
week 16-20
when does vernix/lanugo appear?
week 16-20
when does surfactant start?
24 weeks
when is the respiratory system developed? lungs matured?
32-40 weeks
when does the CNS mature?
36-37 weeks
is the uterine side of the placenta rough or smooth
rough
is the fetal side of the placenta rough or smooth
smooth
what type of blood does the placental vein carry?
oxygenated blood
what type pf blood does the placental artery carry?
non-oxygenated blood