How acurate are estimated birth weights?

hi so i went for my 32 week appointment today, i am having twins who will be born by csection at 36 weeks (i have to have a csec for medical reason and my hospital policy is to deliver id twins by 36 weeks) and today they gave me the girls estimated weights baby A: 5lb 3oz baby b 4lb 2oz now baby bs... show more hi

so i went for my 32 week appointment today, i am having twins who will be born by csection at 36 weeks (i have to have a csec for medical reason and my hospital policy is to deliver id twins by 36 weeks) and today they gave me the girls estimated weights

baby A: 5lb 3oz
baby b 4lb 2oz

now baby bs weight really scared me as it seems so s small, i was just wondering how accurate they were.

thanks
Update: at birth estimated weights for birth
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