Reliable ultrasound charts are necessary for the prenatal assessment of fetal size, yet there is a wide variation of methodologies for the creation of such charts. This paper evaluates the methodological quality of studies of fetal biometry using a set of predefined quality criteria of study design, statistical analysis and reporting methods.
Eighty-three studies met the inclusion criteria, and although multiple regression analysis shows that quality of studies has improved over time, there is considerable heterogeneity in study methodology still observed today. Standardisation of methodologies is necessary in order to make correct interpretations and comparisons between different charts. A checklist of recommended methodologies in proposed.