Lectures: UTZ, Breastfeeding Flashcards
Gestational sac is recognized as early as
4w1d
Mean gestational sac diameter increases by
1mm/day
Yolk sac visible by
5
YS always seen by
5.5w (MSD 8mm) TV
By TAS, YS should be evident by
7w (MSD 20mm)
CRL Embryonic disk is detected between
5-6 w GA (MSD between 5-12mm)
CRL increases by
1mm/day
Most accurate mtd for determining gestational age between 6-12 w gestation
CRL measurement
Cardiac activity should be detected when embyo is
4-5mm (6-6.5w GA) by TVS
evident by 8w GA (MSD is 25mm) by TAS
Amnion is visible at end of
6w
Fetal bradycardia
<85 bpm
Cystic dilatation of 4th ventricle w partial or complete absence of cerebellar vermis
CM enlargement if vertical distance from the vermis to the inner wall if the skull is more than 10mm
Dandy Walker Syndrome
Atrial width 10mm or more
A separation of choroid plexus from medial ventricular wall by 3mm or greater
Venticulomegaly 2nd trim >10mm
Hydrocephalus
Midline defect in anterior abdominal wall = herniation
Omphalocele
Absence of echogenic kidneys, lying adrenal sign,
color flow shows absence of renal arteries
Renal Agenesis