Growth and Development Flashcards
Size 2-3 wks post fertilization:
fetus is microscopic in size
12 wks:
10 cm long
20 wks:
25 cm long
Term (40 wks):
53 cm (21 in)
Weight reaches__pound at 5.5 months
1
Weight reaches @ 7 months:
3 lbs
Weight reaches @ 8 months:
4.5 lbs
weight @ Term:
7 lbs
Mother typically gains ____due to increased blood volume,
in size of fetus, placenta
11 kg
Heart begins beating at______gestation; average heart rate: ___ bpm
4 weeks, 65 bpm
Close to term HR
140 bpm
Cardiac output is constant from ______ bpm
120-180 bpm
Surfactant production between ____ weeks
23/24
__-___ mmHg pressure is needed to open airways
25-40
How is liver metabolism effect in fetus?
decreased
where does the fetal spinal cord end?
L3
Fetal smaller air ways put them at high risk for?
obstruction
How are lung compliance and FRC of a fetus?
Decreased
_______ closing capacity
increased
The large tongue of a fetus puts them at high risk for?
Obstruction
HR
100-180 bpm
cardiac output depends on ________.
heart rate
Normal pco2
40-45 mmHg
Normal Po2
30mmHg (fetal blood leaving placenta)
Why are fetus’ at risk for hypothermia? how is heat produced? what temp should the room be maintained ate?
no shivering mechanism, produce heat by burning brown fat. room at 26 degrees C
RBCs:
3rd wk
Nucleated RBCs formed in yolk sac and
mesothelium of placenta
RBCs 4 wks:
Non-nucleated RBCs from by fetal mesenchymal and endothelial cells.
RBCs 6 wks:
liver forms blood cells
RBCs 12 wks:
spleen and lymphoid tissue, also bone marrow: red and white blood cells,
other
structures lose ability to form blood cells
