fetal development Flashcards
what the stages of fetus development
germinal 2 weeks
embryonic 3-8 weeks
fetal 9-birth
what’re the most important weeks in the pregnancy ?
first 8 weeks
from where the placenta derive ?
from the synciotrophblast (trophoblast) produce the HCG
at the end of the 2nd week primitive utroplacental
from where and when the HCG secreted?
from the synchiotrophoblast occurs on 8,9,10
early 6
late 12 days
when the implantation ?
(7-10 ) around the 6th day
when the lacuna appear ?
on the 9 day in the synchiotrophblast
whats happen in the 3rd week
inner cell mass becomes ebilaminar germ disk into the ecto,meso,endoderm
and the yolk sac
when the yolic sac appear ?
on the 3rd week
fist on 32 day and degenerate on the end of the 16th week
whats happen on the 4th week ?
1- heart 22th week
2- nervous
3- the respiratory as lung buds from forget at the end of the 4th week
whats happen on the 5th week ?
embryo looks more human
will have kidney
pair limbs
and sex differnation at 2month (8week )-3month (12week)
