Biometry
MSD of normal pregnancy grows at ~___/day for the first 10 wks GA.
1 mm
Low-pressure hemorrhages that occur most commonly in the 1st trimester
What is subchorionic hemorrhage?
Most pregnancies are clinically confirmed when a women has?
Missed a menstrual period and has a positive urine or serum pregnancy test.
Vaginal Bleeding in a pregnancy of <20 Weeks is considered a _______?
Threatened abortion or Threatened Miscarriage
Occuring in 2%-4% of ectopic pregnancies, this location is the most life threatening?
Cornual/interstitial location
Successful pregnancy is related to a yolk sac that is ____ in shape.
round
Name 3 methods for imaging the LUS to identify the location of the placenta in relation to the internal-Os.
What are trans-abdominal, trans-labial, and trans-vaginal imaging?
Serial ultrasounds may be ordered if a gestational sac and its contents is less advanced than the patients dates indicate. Also correlation with the patients _______ levels is required.
Human chorionic gonadotropin (HCG)
Large, often bilateral ovarian cysts, in which the formation is usually caused by excessive levels of HCG
Theca-lutein cysts
The endometrium is thickened because of the decidual reaction. During an ectopic pregnancy a _______ may be seen in the uterus.
Pseudosac
Before 10 weeks GA, yolk sac normally measures _____.
2-6 mm, never >7 mm
Vasa previa commonly arise from what types of cord-insert?
What are valementous, marginal, or bilobed/accessory placental cord inserts.
What are the two uterine size-dates discrepancy categories?
Size smaller than dates / Size larger than dates
With this "grape-like disease" as pregnancy progresses into the late first trimester patients with _________ may experience anemia, toxemia, hyperemesis, hyperthyroidism, and/or respiratory insufficiency
Complete hydatidiform mole
This sonographic sign is commonly seen with the use of color doppler during an ectopic pregnancy?
"The ring of fire"
this is helpful when diagnosing an ectopic pregnancy but cannot be the only deciding factor as a corpus luteum cyst can have a similar appearance
At ~8wks GA, GS should fill ____ of the endometrial canal.
Placental abruptions can be classified as:
What are marginal or retroplacental abruptions?
What are fibroids, maternal obesity, surgical scars, and multiple gestations.
A(n) ________ pregnancy is when the pregnancy either ended before a sonographically identifiable embryo formed or the embryo has been resorbed leaving an empty gestational sac
Anembryonic (Blighted ovum)
Ectopic pregnancies are usually diagnosed at?
6-10weeks
How much of screen should baby take up in a NT exam?
fetal head and thorax occupy the whole screen
Possible sonographic findings of placenta accreta.
What is: (1) low implanted GS, (2) large venous lakes within the placenta, (3) projection of the placenta into/through the bladder wall, (4) venous lakes hypervascularity, (5) thinning/loss of retroplacental complex/myometrium
A CRL at >2 standard deviations below the mean for the expected GA.
What is early-onset IUGR?
Embryo demise is diagnosed when an embryo is measuring at least ______ or more is seen with no cardiac activity?
5mm