Lisa J. WhiteSue J. LeeKasia StepniewskaJulie A. SimpsonSaw Lu Mu DwellRatree ArunjerdjaPratap SinghasivanonNicholas J. WhiteFrancois NostenRose McGreadyNuffield Department of Clinical MedicineMahidol UniversityUniversity of MelbourneShoklo Malaria Research Unit2018-06-112018-06-112012-03-07Journal of the Royal Society Interface. Vol.9, No.68 (2012), 503-51017425662174256892-s2.0-84863175565https://repository.li.mahidol.ac.th/handle/20.500.14594/13776Many women in resource-poor settings lack access to reliable gestational age assessment because they do not know their last menstrual period; there is no ultrasound (US) and methods of newborn gestational age dating are not practised by birth attendants. A bespoke multiple-measures model was developed to predict the expected date of delivery determined by US. The results are compared with both a linear and a nonlinear model. Prospectively collected early US and serial symphysis-pubis fundal height (SFH) data were used in the models. The data were collected from Karen and Burmese women attending antenatal care on the Thai-Burmese border. The multiple-measures model performed best, resulting in a range of accuracy depending on the number of SFH measures recorded per mother (for example six SFH measurements resulted in a prediction accuracy of ±2 weeks). SFH remains the proxy for gestational age in much of the resource-poor world. While more accurate measures should be encouraged, we demonstrate that a formula that incorporates at least three SFH measures from an individual mother and the slopes between them provide a significant increase in the accuracy of prediction compared with the linear and nonlinear formulae also using multiple SFH measures. © 2011 The Royal Society.Mahidol UniversityBiochemistry, Genetics and Molecular BiologyChemical EngineeringEngineeringMaterials ScienceArticleSCOPUS10.1098/rsif.2011.0376