Chapter 32 Fetal face and neck Flashcards
The maternal contribution to the placenta is the ?
Decidua basalis
The placenta releases_______ to maintain the corpus luteum?
Human chorionic gonadotropin
An anechoic mass is noted within the umbilical cord during a routine sonographic examination. What is the most likely diagnosis?
Allantoic cyst
Mothers with pregestational diabetes, as opposed to gestational diabetes, have an increased risk of a fetus with?
Neural tube Defects
A succenturiate lobe of the placenta refers to as?
accessory lobe
Pools of maternal blood noted withing the placental substance are referred to as?
maternal lakes
The fetal contribution to the placenta is the
Chorion frondosum
The placenta is considered too thick when it measures?
> 4cm
All of the following are associated with a thin placenta except? A) preeclampsia B) intrauterine growth restriction C) fetal hydrops D) long standing diabetes
fetal hydrops
When the placental edge extends into the lower uterine segment but ends more than 2 cm away from the internal os, it is referred to as?
low lying previa
One of the most common causes of painless vaginal bleeding in the second and third trimester is?
placenta previa
All of the following are associated with a thick placenta except? A) fetal infections B) RH isoimmunization C) placental insuffieicney D)Multiple gestations
Placental insufficiency
Placenta accreta denotes?
the abnormal attachment of the placenta to the myometrium
Doppler sonography reveals vascular structures coursing over the internal os of the cervix. This finding is indicative of?
Vasa previa
All of the following are clinical features of placental abruption except? A) vaginal bleeding B) uterine tenderness C) abdominal pain D) funneling of the cervix
funneling of the cervix
The most common placental tumor is the ?
Chorioangioma
All of the following are associated with oligohydraminos except? A) bilateral renal agenesis B) Infantile polycystic kidney disease C) premature rupture of membranes D) duodenal atresia
duodenal atresia
the normal umbilical cord has?
two arteries and one vein
Insertion of the umbilical cord a the edge of the placenta is referred to as?
marginal cord insertion
increased S/D ration is associated with all of the following except? A) intrauterine growth restriction B) Placental insufficiency C) Allantoic cysts D) perinatal mortality
allantoic cyst
A velamentous cord insertion is associated with?
Vasa previa
normally the S/D ratio?
decreases with advancing gestation
Fetal TORCH is frequently associated with?
intracranial calcification
Evidence of polyhydramnios should warrant a careful investication of the fetal?
gastrointestional system
All of the following are associated with polyhydraminios except?
A) omphalocele
B) gastroschisis
C) esophageal atresia
C) bilateral multicystic dysplastic kidney disease
bilateral multicystic dysplastic kidney disease
IUGR is evident when the EFW is?
below the 10th percentile
The cervix should measure at least ____ in length.
3 cm
The measurement that should be carefully scrutinized in cases of IUGR is the?
abdominal circumference
Doppler assessment of the middle cerebral artery?
can evaluate the fetus for hypoxia
Mothers with gestation diabetes run the risk of?
macrosomic
