Description of new Bulk Centile Calculator

The new Global BCC is derived from an international database with over 3 million births from the anonymised submissions of 30 countries and included 113 ethnic groups or countries of origin which are listed below. Each were analysed to obtain a constant (expected birthweight at 280 days) and coefficients for maternal height and weight, parity and sex, using multiple regression techniques. The principles are explained in the GROW documentation.

For countries or ethnic groups where sufficient data are not yet available, coefficients for the respective regional analysis are provided for use as an approximation. In cases where no ethnic/country of origin information is available, the application applies a global average coefficient.

The built-in explanatory notes provide further details.

We welcome anonymised databases to derive coefficients for additional countries / populations and to complement our international database. Please click here to see preferred format for data.

Please contact us for any further information.

List of ethnicities, countries of origin and regions

Ethnicities / Countries (n=113)

Regions (n=20)