1 Google key work search 1.1 Urinary metabolic variation analysis during pregnancy and application in Gestational Diabetes Mellitus and spontaneous abortion biomarker discovery 1.2 Metabolic profiling of pregnancy: cross- sectional and longitudinal evidence 1.3 Maternal urinary metabolic signatures of fetal growth and associated clinical and environmental factors in the INMA study 1.3.1 结论 1.3.2 Study population 1.3.3 Definition of the fetal and birth measurements 1.4 Variants in the fetal