1ST TRI
T or F- A later sonogram can change the due date after the 1st trimester scan established EDD
FALSE
What step is taken to confirm you are not sampling the same amniotic sac twice, in a twin amniocentesis?
Indigo carmine dye
Absent nasal bone, short femur, duodenal atresia, echogenic bowel
Trisomy 21
The most common cause of non-immune hydrops
Cardiovascular lesions
HCG ______ WITH HYDATIDIFORM MOLE
INCREASES DRASTICALLY
"LMP-3 months + 7 days" formula to calculate EDD is called-
Naegele's rule
Baby's presentation is in relation to what?
The cervix/how it will present at birth
Why can maternal diabetes cause a macrosomic fetus?
Glucose is primary fuel for fetal growth- excess glucose in mother= excess glucose given to baby.
9-11wks
When should you see cardiac motion?
35 days or 5.5wks
What are the rules when measuring FL?
Coarctation of aorta, hydrops, hydronephrosis, cystic hygroma, elevated AFP
Turner's syndrome
Characteristics of pre-eclampsia
protein in urine, high blood pressure, edema
What are the 4 tests in a quad screen? Which was added in to be more sensitive to trisomy 21?
AFP, hCG, unconjugated estriol, Inhibin A.
Inhibin A.
BOWEL HERNIATION STARTS AT ____ WKS AND SHOULD RETURN BY ______ WKS
8, 12
What part of the choroid plexus marks the atrium of the lateral ventricle? This is where we take our measurement.
Glomus
Renal agenesis, pulmonary hypoplasia, oligohydramnios, low set ears. Incompatible with life
Potter's syndrome
asymmetric IUGR is often caused by
placental insufficiency
Blastocyst contains trophoblastic cells and inner cell mass which forms embryo. The trophoblastic cells begin to secrete what hormone?
hCG
A blighted ovum is diagnosed when the GS measures ______ with no embryo seen transabdominally.
>25mm
cerebellar vermis
List the 5 characteristics of Pentalogy of Cantrell
ectopia cordis, abd wall defect, diaphragmatic hernia, distal sternal cleft, intracardiac defect
Fetus dies after reaching a size too large for resorption
What produces AFP in early gestation?
What then produces AFP in later gestation?
Yolk sac
Fetal Liver