For Clinicians & Students

Clinical Resources

Growth charts, calculators, and reference materials for practising clinicians, trainees, and students in maternal-fetal medicine.

Calculators

Clinical Calculators

Interactive tools for gestational dating, biometric assessment, and risk stratification. For educational and clinical reference — always verify against institutional protocols.

Gestational Age Calculator

Soon

Calculate gestational age from LMP or ultrasound dating. Includes EDD estimation and trimester breakdown.

Dating EDD

Estimated Fetal Weight

Soon

Hadlock formula EFW from biometric measurements (BPD, HC, AC, FL). Plots against INTERGROWTH-21st centiles.

Biometry Growth

Preeclampsia Risk (FMF)

Soon

First-trimester combined screening for preeclampsia risk using MAP, UtA PI, PLGF, and PAPP-A.

First trimester Screening

Cervical Length Risk

Soon

Spontaneous preterm birth risk stratification based on cervical length measurement at 18–24 weeks.

Preterm Cervix

BMI & Weight Gain

Soon

Pregnancy BMI classification and Institute of Medicine gestational weight gain recommendations.

Nutrition Obesity

Umbilical Artery Doppler PI

Soon

Plot UA Doppler PI against INTERGROWTH-21st reference ranges for gestational age.

Doppler FGR

Growth Charts

Fetal & Newborn Growth References

Interactive centile charts based on internationally validated reference standards.

INTERGROWTH-21st Fetal Growth

Soon

Estimated fetal weight centile charts from the INTERGROWTH-21st Project. Recommended international standard for fetal growth surveillance.

EFW International

Stirnemann et al. Ultrasound Obstet Gynecol, 2017

INTERGROWTH-21st Newborn Size

Soon

Postnatal size-for-gestational-age charts for weight, length, and head circumference at birth.

Neonatal International

Villar et al. Lancet, 2014

WHO Fetal Growth Charts

Soon

World Health Organization fetal biometric reference ranges for BPD, HC, AC, and FL across gestational ages.

Biometry WHO

WHO, 2017

Fetal Organ Biometry

Soon

Reference ranges for fetal organ measurements including cerebellum, cisterna magna, lateral ventricles, and renal pelvis.

Biometry Anatomy

Chitty & Altman, 2003

Guidelines & References

External Resources

Curated links to major clinical guidelines and evidence-based references in maternal-fetal medicine.

ISUOG

ISUOG Practice Guidelines

Ultrasound in Obstetrics & Gynecology practice guidelines covering routine and targeted fetal anomaly scanning.

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RCOG

RCOG Green-top Guidelines

Royal College of Obstetricians and Gynaecologists evidence-based clinical guidelines in obstetrics and gynaecology.

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SMFM

SMFM Consult Series

Society for Maternal-Fetal Medicine consult series and clinical guidelines on complex obstetric conditions.

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University of Oxford

INTERGROWTH-21st Resources

Downloadable charts, apps, and centile calculators from the INTERGROWTH-21st Project for fetal and newborn growth.

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All calculators and charts on this site are intended for educational and clinical reference purposes only. They do not replace clinical judgement or institutional protocols. Always verify results against current evidence-based guidelines and consult appropriate specialists for individual patient management.