Chapter 47 green boxes Flashcards
shape
position
contour
wall (trophoblastic reaction)
internal landmarks
growth
normal gestational Sac
round or oval
gestational sac shape
fundal or middle portion of uterus, center position relative to endometrium
(double decidual sac or intradecidua findings)
gestational sac position
smooth
gestational sac contour
echogenic
gestational sac wall
yolk sac present when gestational sac is larger than 12mm
embryo present when gestational sac is larger than 18mm
gestational sac internal landmarks
1mm/day (range .7mm to 1.5 mm/day)
gestational sac growth
prominent neural folds and neural groove are recognizable
week 5 menstrual age
heart begins to beat
day 36 menstrual age
anterior and posterior neuropores close and neural tube forms
week 6 menstrual age
upper and lower limb buds are present
day 41 menstrual age
crown-rump length is 4 mm
day 42 menstrual age
paddle shaped hand plates are present
lens pits and optic cups have formed
day 46 menstrual age
cerebral vesicles are distinct
day 48 menstrual age
oral and nasal cavities are confluent
day 50 menstrual age
upper lip is formed
day 52 menstrual age
digital rays are distinct
day 54 menstrual age
crown-rump length is 16 mm
day 56 menstrual age
cardiac ventricular septum is closed
truncous arteriosus divides into aorta and pulmonary trunk.
kiodney collecting tubes develope
week 9 menstrual age
eyelids develope
day 58 menstrual age
upper limbs bend at elbows
fingers are distinct
day 64 menstrual age
glomeruli form in metanephros
week 10 menstrual age
genitalia show some female characteristics but are still easily confused with male genatalia
day 73 menstrual age
face has human appearace
day 80 menstrual age
genitalia have male and female characteristics but still are not fully formed
day 82 menstrual age
crown rump length is 56 mm
day 84 menstrual age
ossification is complete throughout vertebral column
month 7 menstrual age
ossification centers appear in distal and femoral epiphysis
month 8 menstrual age
hCG level 0-5 mIU/ml
3 menstrual weeks
hCG level 5-426
4 menstrual weeks
hCG level 18-7340
5 menstrual weeks
hCG level 1080-56500
6 menstrual weeks
hCG level 7650-229,000
7-8 menstrual weeks
hCG level 25,700-288,000
10-12 menstrual weeks
gestational sac appears
4-5 menstrual week
yolk sac appears
5 menstrual week
fetal heartbeat appears
5.5-6 menstrual week
fetal pole appears
6 menstrual week
single ventricle appears
7 menstrual week
spine appears
7.5 menstrual week
lower limbs appear
7.5 menstrual week
upper limbs appear
8 menstrual week
falx appears
9 menstrual week
body movements appear
9 menstrual week
limb movements appear
9.2 menstrual week
midgut herniation appears
9.5 menstrual week
choriod plexus appears
9.5 menstrual week
ndbrain appears
9.5 menstrual week
fingers appear
12 menstrual week
jaw appears
12 menstrual week
toes appear
12.5 menstrual week
fetal heart beat
92-109
5 gestational weeks
fetal heart beat
112-136
6 gestational weeks
fetal heart beat
112-140
7 gestational weeks
fetal heart beat
126-160
8 gestational weeks
fetal heart beat
126-150
8-10 gestational weeks
fetal heart beat
120-150
11 gestational weeks
fetal heart beat
125-160
12 gestational weeks
margins of the NT edges are clear
fetus is in s midsagital plane
fetus occupies msjority of image
fetal head is in neutral position
fetus observed away from the amnion
nuchal transluceny measurement criteria
+ calipers are used
horizontal crossbars are placed correctly on the inner surface of the border of the lucency
calipers are placed perpendicular to the long axis of the fetus
measuement is take at the widest NT space
Nuchal measurment procedure