Obstetric Ultrasound Report Interpretation

Report 1 - Ultrasound Obstetric

Findings Summary

Biometric Measurements vs. Expected (36 weeks 1 day)

Key Biometric Interpretation

• HC (head circumference) is at 46th percentile - the brain is being "spared" with blood preferentially directed there
• AC (abdominal circumference) is severely lagging at <3rd percentile - the liver and abdominal organs (which reflect glycogen stores and nutritional status) are being deprived
• This "brain-sparing" pattern is classic for uteroplacental insufficiency

Report 2 - Color Doppler Examination

Doppler Values

Doppler Interpretation

• Umbilical arteries: Normal resistance (RI 0.3-0.4). Normal diastolic flow is present - the placenta is not severely compromised
• Fetal MCA (Middle Cerebral Artery): RI of 1.0 is at the upper end of normal - high resistance in the brain vessels is the expected normal finding
• Uterine arteries: Normal, no bilateral notching - this means maternal uteroplacental blood supply is adequate
• Cerebroplacental Ratio (CPR) of 4.5 > 99th percentile: This is technically normal. However, the CPR is most meaningful when it drops (a low CPR indicates blood being preferentially redirected to the brain - the "brain sparing" effect). Here the CPR is high/normal, meaning Doppler has not yet shown redistribution despite the asymmetric growth pattern on biometry

Biophysical Profile (BPP)

Overall Clinical Picture

1. Oligohydramnios - AFI 6.2 cm (borderline; the official cutoff is <5 cm but 6.2 cm at near-term still warrants monitoring). Possible causes include uteroplacental insufficiency, fetal renal issues, or PROM (ruptured membranes).
2. Asymmetric FGR - AC at <3rd percentile with EFW ~2336 g is a small-for-gestational-age fetus with brain-sparing pattern. As the textbook notes, "at fetal weights less than the 10th percentile, the risk for fetal death is 1.5%; this increases to 2.5% with weights less than 5th percentile" - this fetus is likely below 5th percentile for gestation.
3. Single nuchal cord - A cord around the fetal neck once (single loop) is found in ~20-25% of deliveries. It is not in itself dangerous but combined with oligohydramnios (less fluid to cushion cord compression), it deserves continuous intrapartum fetal heart monitoring.

• Normal Doppler (no absent or reversed end-diastolic flow in umbilical arteries) - this suggests placental reserve is still present
• No uterine notching - maternal blood supply is adequate
• Normal fetal tone, movements, and breathing on BPP

What Should Happen Next (Clinical Recommendations)

1. Hospital admission is advisable at this gestation with oligohydramnios + FGR + equivocal BPP
2. Repeat BPP and Doppler within 24-48 hours; if BPP drops to 4/8 or Doppler worsens (absent/reversed flow), delivery is indicated
3. Non-stress test (NST) / continuous CTG monitoring to assess fetal well-being
4. Check for PROM - oligohydramnios can sometimes result from slow amniotic fluid leak; speculum examination and PROM testing (ferning/nitrazine) may be indicated
5. Delivery planning: At 36+ weeks with this clinical picture, delivery is likely to be recommended soon. Steroids (betamethasone) for fetal lung maturity may be considered if delivery is anticipated before 37 weeks
6. Mode of delivery: With a cephalic presentation and currently normal Doppler, vaginal delivery with continuous CTG monitoring is possible, but fetal distress risk is higher given oligohydramnios + nuchal cord. Low threshold for CS if decelerations occur

Important: This report interpretation is for informational purposes. Please consult your referring obstetrician (Dr. Anjum Fatima) immediately, as this clinical picture may require urgent assessment. Do not delay seeking medical attention.