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Fetal Growth and Wellbeing Assessment | Tests, Growth Charts & Cost Guide
Fetal Growth and Wellbeing Assessment is a structured clinical framework used during the late second and third trimesters of pregnancy to ensure a baby is growing at an appropriate trajectory and receiving adequate oxygen and nutrients from the placenta.
While routine maternal care relies on physical metrics like Symphysis-Fundal Height (SFH), detailed growth and wellbeing evaluations utilize advanced ultrasonography, Doppler blood flow velocimetry, and electronic fetal heart rate monitoring. These assessments help clinicians differentiate between a fetus that is constitutionally small (healthy) and one affected by Fetal Growth Restriction (FGR) or placental insufficiency.
Core Pillars of Fetal Growth and Wellbeing Evaluation
Surveillance is categorized into Biometric Assessment (measuring physical growth) and Biophysical / Functional Assessment (evaluating placental function and oxygenation).
[Fetal Growth & Wellbeing Assessment]
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[Growth Biometry] [Wellbeing & Surveillance]
• Estimated Fetal Weight (EFW) • Umbilical Artery Doppler (UAD)
• Abdominal Circumference (AC) • Middle Cerebral Artery (MCA) / CPR
• Head Circumference & Femur Length • Biophysical Profile (BPP) & NST
• Customised Growth Charts (GAP/GROW) • Amniotic Fluid Index (AFI)
Summary of Assessment Methods
| Test / Metric | Primary Focus | Clinical Purpose | Frequency / Timing |
| Growth Biometry (USG) | Physical Dimensions (BPD, HC, AC, FL) | Calculates Estimated Fetal Weight (EFW) and tracks growth velocity across centiles. | Every 2 to 4 weeks in third trimester. |
| Umbilical Artery Doppler (UAD) | Placental Vascular Resistance | Primary surveillance tool for placental sufficiency; identifies elevated resistance or absent/reversed end-diastolic flow. | Bi-weekly or weekly in FGR/high-risk cases. |
| Cerebroplacental Ratio (CPR) | Fetal Redistribution (“Brain-Sparing”) | Compares Middle Cerebral Artery (MCA) flow to Umbilical Artery flow to detect early hypoxemia. | Done alongside Doppler scans in growth-restricted cases. |
| Non-Stress Test (NST) | Fetal Heart Rate Autonomic Response | Monitors heart rate accelerations relative to fetal movement to check immediate nervous system oxygenation. | Weekly or bi-weekly from 32+ weeks in high-risk pregnancies. |
| Biophysical Profile (BPP) | Multi-parameter Physiological Status | Combines NST with ultrasound criteria (fetal breathing, movement, tone, and liquor volume). | As needed when NST or growth velocity is non-reassuring. |
| Amniotic Fluid Index (AFI) | Renal Perfusion & Liquor Volume | Measures amniotic fluid pools; oligohydramnios indicates chronic reduced renal blood flow. | Part of routine third-trimester ultrasound evaluations. |
Clinical Assessment Pathway for Fetal Growth
1.1. Clinical Screening via SFH Measurement:From 24 Weeks Onward.
Symphysis-Fundal Height (SFH) is plotted on customized growth charts at every antenatal visit. A single measurement below the 10th centile or crossing centiles downwards triggers an ultrasound referral.
2.2. Comprehensive Biometry & Fluid Assessment:Third Trimester Scan.
Detailed ultrasound measures abdominal circumference (AC) and EFW. Amniotic Fluid Index (AFI) or Single Deepest Pocket (SDP) is measured to evaluate renal perfusion.
3.3. Color Doppler Velocimetry:If EFW or AC < 10th Centile.
Umbilical Artery (UA) and Middle Cerebral Artery (MCA) Dopplers are performed to check for placental resistance, blood flow redistribution, or vascular compromise.
4.4. Active Antenatal Surveillance & BPP:High-Risk or Pathological FGR.
Regular Non-Stress Tests (NST) and Biophysical Profiles (BPP) monitor immediate wellbeing. Timely delivery is planned if Doppler waveforms deteriorate or BPP score drops below acceptable thresholds.
Indicative Cost Estimates for Assessments
Costs vary based on laboratory setting, ultrasound machinery resolution, and regional healthcare pricing:
- Routine Fetal Growth Ultrasound (Biometry + AFI): ₹1,500 – ₹3,500
- Growth Scan with Color Doppler (UA + MCA): ₹3,000 – ₹6,000
- Non-Stress Test (NST / Cardiotocography): ₹800 – ₹1,800 per session
- Full Biophysical Profile (BPP + NST): ₹3,500 – ₹7,000
Frequently Asked Questions (FAQs)
1. What is the difference between Small-for-Gestational-Age (SGA) and Fetal Growth Restriction (FGR)?
An SGA fetus has an Estimated Fetal Weight (EFW) below the 10th centile for its gestational age but may simply be constitutionally small and completely healthy. vedantaspecialityclinics.com implies a pathological condition where the fetus is unable to achieve its biological growth potential, often due to placental insufficiency, and displays abnormal Doppler findings or slowing growth velocity.
2. How often should growth ultrasound scans be performed?
To ensure accurate measurement of growth velocity and avoid false positives, serial growth biometry scans should ideally be spaced at least 3 weeks apart. However, Doppler evaluations and NSTs may be performed weekly or twice weekly if a baby is known to have FGR.
3. What does a “brain-sparing effect” mean on a Doppler ultrasound?
When the placenta fails to deliver adequate oxygen, the fetus adapts by redistributing blood flow to protect vital organs like the brain. This causes increased blood flow through the Middle Cerebral Artery (MCA) relative to the umbilical artery, known as the brain-sparing effect.
4. What is a Biophysical Profile (BPP) score, and what is considered normal?
A Biophysical Profile evaluates 5 parameters (NST, fetal breathing movements, body movements, muscle tone, and amniotic fluid volume), awarding 2 points each. A total score of 8 out of 10 or 10 out of 10 is considered normal and reassuring.
5. Can reduced fetal movements indicate growth or wellbeing issues?
Yes. A reduction in fetal movements can be a maternal sign of fetal compromise or energy conservation due to chronic placental insufficiency. Any noticeable change in movement patterns after 28 weeks warrants immediate evaluation with an NST and ultrasound scan.