Looking at DS - birth 3.75kg (75th centile), 12m 8.5kg, 14m 9kg (9th centile). Currently 14kg, has been since he was just over 3 (he's now 4.5yrs). The puts him on the 2nd centile: so still perfectly normal. There are children out there lighter than him still.
He eats like a horse and has the same metabolism as his parents had. What a shocker! If anyone were to refer him for failure to thrive at 13m I would laugh and point out he eats, he develops, he is as skinny as expected given genetics.
I just thought I'd comment on the tests that my DS is having as he hasn't been gaining on the normal curve. Our paediatrician is great, she is reassuring but at the same time very thorough in her approach.
We've had a stool sample to check for how he absorbs nutrients as I'm reporting quite a reasonable BM intake (I EE so I know how much he has).
I'm also coeliac and you can get a Buccal Swap taken (they run a brush inside their cheek at pathology) to see if they have the genetic mutation for coeliac disease. If it's positive it means they have the potential to develop coeliac disease in their lifetime. This test can be bulk billed!
If you LO has been having gluten for the last 6 weeks they can also take a blood test to check for coeliac antibodies.
The slowed weight gain for my DS just might be him finding his centile after birth (he was on the 75th for weight at birth) due to his genetic imprint for body size - my family is mostly on the thin side.
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