Ultrasound baby weight accuracy

Is ultrasound baby weight accurate? I m 37w and Dr told me my baby is at 3.2kg, i wonder if baby weight via ultrasound is accurate coz i dont gain much weight though... And Dr also said, for normal delivery, baby should not be > 3.5kg, so i might be induced before EDD :s, else baby will be too big for normal delivery Appreciate your experience sharing!

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ultrasound shows 3.2kg. come out only 3.05kg

Yes , Most of the times

+/- 10%.