Work out foetal growth percentile instantly with clear inputs, formula shown and shareable results.
Converts an estimated foetal weight into a percentile against the gestation-specific reference mean and standard deviation you supply.
Percentile from z-score
z = (estimated weight - reference mean) / reference SD; percentile = 100 x Phi(z)
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Customised or INTERGROWTH-21st charts are common; the reference values entered should match the chart in use.
No. Growth restriction implies a pathological failure to reach growth potential, which some constitutionally small babies do not have.