At 36 weeks, 2.49kg is a bit on the lighter side but not unusual lah, setiap baby different growth rate. Better to ask your doctor or midwife to check the ultrasound trends, see if baby's weight gain is steady or if anything needs monitoring, because they can tahu better based on your scan readings and health history. Don't worry too much yet, but do follow up with your antenatal checkup, okay?