measured from outer margin to inner margin
What is the bi-parietal diameter?
The best measurement indicator of growth
What is the abdominal circumference?
type of IUGR characterized by a high HC/AC ratio
What is asymmetric IUGR?
This maternal condition may lead to macrosomia or IUGR
What is diabetes?
(Peak systolic velocity - end diastolic velocity)/peak systolic velocity
What is the resistive index?
accurate within 5-7 days
What is crown rump length?
Estimated fetal weight >90th percentile
What is LGA (large for gestational age)?
most common cause of asymmetric IUGR
What is placental insufficiency?
a rare genetic disorder characterized by overgrowth
What is Beckwith-Wiedemann syndrome?
What is normal umbilical artery Doppler waveform?
MSD(mm) + 30 =
What is gestational age (in days)?
growth parameters <10% without insult or pathological cause
What is SGA (small for gestational age)?
Most common causes of symmetric IUGR
What are TORCH infections and genetic disorders?
shoulder dystocia, asphyxiation, cord compression
What are birth complications associated with macrosomia?
What is abnormally high resistance umbilical artery waveform?
the most reliable indicator of fetal age when head shape may be altered
What is width of the cerebellum?
In response to adverse growing conditions (eg:hypoxia) the fetal body redirects the majority of blood flow to the head
What is brain sparing?
Type of IUGR characterized by a low HC/AC ratio
What symmetric IUGR?
Abnormal amniotic fluid level seen in diabetic mothers
What is polyhydramnios?
a sign of severe placental insufficiency and fetal distress seen in the umbilical artery
What is diastolic flow reversal?
maximum normal measurement of the lateral ventricles, cisterna magna, and renal pelvis
What is 10mm or 1cm?
The organ most affected by placental insufficiency
What is the liver?
The sign of an overly mature placenta
What is a grade 3 placenta before 34 weeks?
The definition of macrosomia
What is having a birth weight >4000g?
abnormal S/D ratio for the umbilical artery
What is >3.0 after 30 weeks?