you need to go to see a GP to get referral letter for the ultrasound or see Obstetrician.
However, ask the GP if the Obstetrician does ultrasound in the clinic. Some of the Obstetrician doesn't have the equipment especially the gwei-lo Obstetrician.
Birth 15/3: W:4.2kg L:52cm HC:37.5cm
Day 09: W:4.37kg L:55.5cm HC:37cm
Day 46: W:7kg L:62m HC40.5cm
Day 82: W:~9.2kg L:~66cm
Day 112: W:~10.4kg