Mine is 12.7 kgs for last months as well. Height is same as well the last 3 months.
@Laura My boy is like 'i am hungry' every 30 mins after having a nice quantity of food. But still the same weight.
@Maria J Oh bless! My sons height has increased 3cm from what I measured last.
Mine eats like a 15 year old and hasn’t gained an ounce in months! Apparently it’s normal at this age
Mine is the same, he’s always been really narrow and tbh doesn’t eat loads… however he’s absolutely thriving and so bright and clever so I’m not too worried, I think now he’s getting more into activities he’ll naturally want to eat more and get stronger. If you are concerned though there would be no harm in it, even just for the reassurance.