Defining safe criteria to diagnose miscarriage: prospective observational multicentre study

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• Data Supplement - Web extra supplementary figure: measurement of mean gestational sac diameter, with diameters measured in three orthogonal planes
• Data Supplement - Web extra supplementary fig S1: sensitivity and specificity by mean sac diameter cut-off for pregnancies with empty gestational sac on initial scan
• Data Supplement - Web extra supplementary fig S2: sensitivity and specificity by mean sac diameter cut-off for pregnancies with gestational sac and yolk sac visible on initial scan
• Data Supplement - Web extra: supplementary fig S3: sensitivity and specificity by crown-rump length cut-off for pregnancies with a visualised embryo with no heart activity
• Data Supplement - Web extra supplementary fig S4: scatter plot of initial mean sac diameter and interval between scans for pregnancies with gestational sac and visible yolk sac on initial scan but still intrauterine pregnancy of unknown viability on repeat scanning
• Data Supplement - Web extra supplementary fig S5: scatter plot of mean sac diameter growth and interval between scans for pregnancies without embryo on initial scan but still intrauterine pregnancy of unknown viability on repeat scanning
• Data Supplement - Web extra supplementary table S1: outcome at 11-14 weeks in relation to initial presentation
• Data Supplement - Web extra supplementary table S2: diagnostic performance of measurements of mean gestational sac diameter to predict miscarriage in pregnancies with gestational sac and visible yolk sac
• Data Supplement - Web extra supplementary table S3: descriptive statistics stratified by initial and repeat scan outcomes
• Data Supplement - Web extra supplementary table S4: diagnostic performance of measurements of mean sac diameter in relation to gestational age at presentation to predict miscarriage in pregnancies without an embryo (with or without yolk sac)
• Data Supplement - Web extra supplementary table S5: diagnostic performance of crown-rump length in relation to gestational age at presentation to predict miscarriage in pregnancies where an embryo with no heart activity has been visualised
• Data Supplement - Web extra supplementary table S6: diagnostic performance of absence of embryo heart activity in relation to initial mean gestational sac diameter and interval between scans to predict miscarriage in pregnancies without an embryo (with or without yolk sac)
• Data Supplement - Web extra supplementary table S7: diagnostic performance of absence of embryo heart activity in relation to interval between scans to predict miscarriage in pregnancies where an embryo with no heart activity has been visualised
• Data Supplement - Web extra supplementary table S8: diagnostic performance of absence of embryo heart activity and mean gestational sac diameter growth in relation to initial diameter and interval between scans to predict miscarriage in pregnancies without an embryo (with or without yolk sac)