PU Fetal Biometry and Growth Assessment 1 — Questions and Answers
Question 1: Which measurement is considered the most accurate indicator of gestational age in the second trimester?
- Biparietal diameter (BPD) (Correct answer)
- Femur length (FL)
- Abdominal circumference (AC)
- Head circumference (HC)
Correct answer: Biparietal diameter (BPD)
The biparietal diameter is the most widely used and reliable measurement for estimating gestational age in the second trimester.
Question 2: What does IUGR stand for in obstetric ultrasound?
- Intrauterine Growth Restriction (Correct answer)
- Internal Uterine Growth Rate
- Intrauterine Gestational Ratio
- Integrated Uterine Growth Response
Correct answer: Intrauterine Growth Restriction
IUGR (Intrauterine Growth Restriction) refers to a condition where the fetus does not grow at the expected rate inside the womb.
Question 3: The estimated fetal weight (EFW) formula most commonly used in clinical practice incorporates which measurements?
- BPD, HC, AC, and FL (Correct answer)
- BPD and AC only
- HC and FL only
- AC and BPD only
Correct answer: BPD, HC, AC, and FL
The Hadlock formula, which incorporates BPD, HC, AC, and FL, is the most widely used method for estimating fetal weight.
Question 4: A fetus measuring below which percentile is typically classified as small for gestational age (SGA)?
- 10th percentile (Correct answer)
- 25th percentile
- 5th percentile
- 15th percentile
Correct answer: 10th percentile
A fetus with an estimated weight below the 10th percentile for gestational age is classified as small for gestational age (SGA).
Question 5: Which fetal measurement best reflects fetal nutrition and soft tissue mass?
- Abdominal circumference (AC) (Correct answer)
- Head circumference (HC)
- Biparietal diameter (BPD)
- Femur length (FL)
Correct answer: Abdominal circumference (AC)
The abdominal circumference reflects the size of the liver and subcutaneous fat, making it the best indicator of fetal nutrition.
Question 6: What is the normal range for amniotic fluid index (AFI) in a term pregnancy?
- 8–24 cm (Correct answer)
- 2–6 cm
- 25–35 cm
- 1–5 cm
Correct answer: 8–24 cm
A normal AFI at term ranges from 8 to 24 cm; values below 5 cm indicate oligohydramnios and above 24 cm indicate polyhydramnios.
PU Fetal Biometry and Growth Assessment 1
Which measurement is considered the most accurate indicator of gestational age in the second trimester?