International standards for symphysis-fundal height based on serial measurements from the Fetal Growth Longitudinal Study of the INTERGROWTH-21stProject: prospective cohort study in eight countries
Papageorghiou AT., Ohuma EO., Gravett MG., Hirst J., da Silveira MF., Lambert A., Carvalho M., Jaffer YA., Altman DG., Noble JA., Bertino E., Purwar M., Pang R., Cheikh Ismail L., Victora C., Bhutta ZA., Kennedy SH., Villar J.