Clinical Editorial & Scientific Policy
How we review, mathematically validate, and reference peer-reviewed sonographic guidelines on CRL Age Calculator (crlagecalculator.com).
1. Peer-Reviewed Evidence Only
Every formula, growth percentile curve, and anatomical developmental milestone published on this platform originates from established peer-reviewed journals (e.g. British Journal of Obstetrics and Gynaecology, Radiology, Ultrasound in Obstetrics & Gynecology) and guidance from major societies (BMUS, ACOG, ISUOG, FMF).
2. Mathematical Rigor & Unit Tests
Our codebase contains automated test suites checking our Robinson & Fleming and Hadlock equations against published benchmark ultrasound measurement tables. Edge cases (under 5 mm, over 84 mm) include explicit sonographic advisory alerts.
3. Clear Clinical Disclaimers
We clearly distinguish educational information from individualized clinical diagnosis. We actively encourage pregnant individuals to discuss all ultrasound measurements with their direct obstetric care team.