yu xi is 10.8kg, 80.9cm (around 25-50 percentile)
yu ze is 12.4kg, 90cm (remains as his 3 percentile)
pd say both are ok. if i want to 'fatten' yu ze up then give more proteins and fats. his output could be higher than input so not putting on weight. but he is still ok, nothing wrong.
yu ze cry when jab and keep whining pain pain after that. took a while to stop and we bought him 'duck' (thomas's friend) to compensate his 'pain'.
yu xi also cry but stop almost immediately cos the nurse give her a pack of biscuit. this is how she works, immediately forget about the pain once there is food.