what 2 things make up the umbilical cord Correct Answer yolk
sac, yolk stalk
function of yolk sac Correct Answer provides nutrients
normal yolk sac size Correct Answer 3-6 mm
another name for an anembyonic pregnancy Correct Answer
blighted ovum
by what week should the chorion and amnion fuse? Correct
Answer 16 weeks
signs of a 1st trimester loss: Correct Answer negative FHR with a
CRL >5mm or 6.5 weeks from LMP
large yolk sac w/o FP
calcified yolk sac
large gestational sac >25mm w/o FP or >8mm w/o yolk sac
, what is the normal growth rate of a gestational sac Correct
Answer 1 cm/wk for first 10 weeks
by what week should you no longer see a yolk sac? Correct
Answer 12 weeks
Gestation age equation Correct Answer GA = MSD + 30 days or
CRL + 6.5 cm
Mean sac diameter equation Correct Answer MSD = (L + W +
D)/3
1st trimester visualized anatomy Correct Answer GS @ 5 weeks
and 5 mm MSD
GS and yolk sac @ 5.5 wks
GS and yolk sac and FP @ 6 wks
location of anterior-cul-de-sac Correct Answer between bladder
and uterus
location of posterior-cul-de-sac Correct Answer between uterus
and rectum
location of space of retzius Correct Answer between bladder and
symphysis pubis
what is the most common congenital uterine anomaly? Correct
Answer bicornuate uterus
arcuate arteries Correct Answer peripheral arteries at the edge of
the myometrium
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