In-Lecture Review Qs Flashcards
hormone that triggers ovulation
LH
structure that does not assist ova to move into/through fallopian tube
infindibulum
a cluster/ball of forming cells
morula
portion of endo related to blastocyst attachment
decidua basalis
1st structure seen sonographically within uterus in early pregnancy
chorionic cavity
the placenta will mature from early to release ALL except
LH
releases estrogen, progesterone, b-hCG
when NT measurement is combined with (2), the detectionrate increases to 86%
PAPP-A
free b-hCG
what phase of the menstrual cycle do follicles become dominant
late follicular/proliferative
amenorrhea defined as
menstral cessation
US is ordered in postmenopausal women most often for
vag bleeding
Diff between gest age/concept age
GA=CA+2wk
first trimester screening test that requires an accurate dating US
nuchal translucency exam
what growth disorder can result in small dates for pregnancy
IUGR
non-pathology related cause of a large for dates pregnancy (2)
wrong dates
multifetal preg
what is the first sono feature used to determine GA?
mean sac diameter
most accurate predictor of GA?
CRL
measurements used to determine GA in 2/3 trimester (4)
BPD
HC
AC
FL
fetal measurement least influenced by fetal movement/posture
FL
what are soft markers?
variants that increase risk for aneuploidy
t/f eyes should be symmetrical, approx 2 eye lengs apart
false. one eye length apart
what are the 5 main tissue prominences that make up the early fetal face
frontonasal maxillary mandibular lateral nasal medial nasal
at what GA can a nasal tip be visualized on US
week 7
what is the name of the primitive mouth?
stomodeum
which direction do the eyes migrate during early development?
anteromedial (lateral to medial)
t/f increased facial angle is assoc with chrom abnormalities
ture
which views are most useful in visualizng clefts?
transverse view of maxilla/mandible
