doi:10.3390/jcm10132984engSavirón-Cornudella, RicardoEsteban, Luis MarianoAznar-Gimeno, RocioDieste-Pérez, PeñaPérez-López, Faustino R.Campillos, Jose M.Castán-Larraz, BeatrizSanz, GerardoTajada-Duaso, MauricioPrediction of late-onset small for gestational age and fetal growth restriction by fetal biometry at 35 weeks and impact of ultrasound–delivery interval: comparison of six fetal growth standardsART-2021-124563Small-for-gestational-age (SGA) infants have been associated with increased risk of adverse perinatal outcomes (APOs). In this work, we assess the predictive ability of the ultrasound-estimated percentile weight (EPW) at 35 weeks of gestational age to predict late-onset SGA and APOs, according to six growth standards, and whether the ultrasound–delivery interval influences the detection rate. To this purpose, we analyze a retrospective cohort study of 9585 singleton pregnancies. EPWs at 35 weeks were calculated to the customized Miguel Servet University Hospital (MSUH) and Figueras standards and the non-customized MSUH, Fetal Medicine Foundation (FMF), INTERGROWTH-21st, and WHO standards. As results of our analysis, for a 10% false positive rate, the detection rates for SGA ranged between 48.9% with the customized Figueras standard (AUC 0.82) and 60.8% with the non-customized FMF standard (AUC 0.87). Detection rates to predict SGA by ultrasound–delivery interval (1–6 weeks) show higher detection rates as intervals decrease. APOs detection rates ranged from 27.0% with FMF to 7.9% with the Figueras standard. In conclusion, the ability of EPW to predict SGA at 35 weeks is good for all standards, and slightly better for non-customized standards. The APO detection rate is significantly greater for non-customized standards.2021http://zaguan.unizar.es/record/10667310.3390/jcm10132984http://zaguan.unizar.es/record/106673oai:zaguan.unizar.es:106673info:eu-repo/grantAgreement/ES/MINECO/MTM2017-83812-PJournal of Clinical Medicine 10, 13 (2021), 2984 [17 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess