Early fetal development Flashcards
1
Q
Day 0
A
Fertilization, initiating embryogenesis
2
Q
Within week1
A
hCG secretion after implantation of blastocytes
3
Q
Within week2
A
Bilaminar disc (epiblast, hypoblasts) Two weeks= two layer
4
Q
Within week 3
A
Trilaminar disk/gastrulation
Three weeks = three layers
Primitive streak, notochord, medoserm and organization
Neural plate begin to form
5
Q
Within 3-8 wk
A
Neural tube formed by neuroectoderm and close by wk 4
Organogenesis
Extremely susceptible to teratogen
6
Q
Week 4
A
Heart start to beat
Upper and lower buds begin to form
4 wks = 4 limbs
7
Q
Week 8 (start of fetal period)
A
Fetal movement
Fetus looks like a baby
“You become a human at 8, man at 10”
8
Q
Week 10
A
Genitalia have male/female characteristics
“You become a human at 8, man at 10”
