Biometric Measurements
High-Risk Conditions
Pathology
Twin Pregnancies
Sonographic Findings
100

The measurement used to estimate gestational age early in the first trimester

Crown-rump length (CRL) 
100

This condition involves high blood pressure and proteinuria during pregnancy

Preeclampsia 

100

This condition results in fluid accumulation in at least two fetal compartments, such as pericardial and pleural cavities. 

Hydrops Fetalis

100

What lab value will be elevated in multiple gestation pregnancy? 

MSAFP

100

What vessel is dopplered when assessing fetal anemia?

Middle Cerebral Artery (MCA)

200

What is the most reliable measurement for assessment of fetal head

Head Circumference (HC) 

200

A fetus measuring below the 10th percentile for gestational age is

IUGR

200

Rare Rh immune response in which a mother develops antibodies to fetal platelets. 

Alloimmunization 

200

These twins result from division of a single zygote

Monozygotic twins 

200

Sonographic visualization of two placentas would indicate what kind of pregnancy

Dizygotic, diamniotic pregnancy

300

This exam evaluates fetal well-being and includes 5 parameters like breathing and movement

Biophysical Profile (BPP)

300
This condition refers to excessive amniotic fluid

Polyhydramnios

300

The sonographic sign, associated with fetal demise, describes overlapping cranial bones

Spalding Sign

300

This rare anomaly involves a twin without a functioning heart.

Acardiac twin

300

This anomaly is indicated by the “lemon” and “banana” signs on ultrasound.

Spina Bifida

400

This growth pattern presents with a normal head measurement and a small abdominal circumference.

Asymmetric IUGR
400

Excessive vomiting that leads to dehydration and electrolyte imbalance

Hyperemesis Gravidarum

400

Infants with this disease are at increased risk for intracerebral hemorrhage in utero and spontaneous bleeding 

Thrombocytopenia

400

This term refers to the flattened, compressed appearance of a demised twin too large for resorption.

 Fetus Papyraceous

400

Elevated blood pressure diagnosed in a patient before 20 weeks of gestation 

Chronic Hypertension

500

What can cause a fetus to be small for gestational age

chromosomal anomalies, intrauterine infection, genetics, placental insufficiency


500

Lack of development of the caudal spine and cord that may occur in the fetus of a diabetic mother

Caudal Regression Syndrome

500

 This congenital heart defect is commonly associated with diabetic pregnancies.

Transposition of the great arteries (TGA)

500

Monozygotic twin pregnancy with single placenta and arteriovenous shunt within the placenta 

Twin-to-twin Transfusion Syndrome (TTTS)

500

What are the five sonographic findings associated with fetal death

1. Absent heart beat

2. Absent fetal movement

3. Spalding's sign

4. Exaggerated spinal curvature

5. Gas in fetal abdomen