Honestly, I think DD gained a total of 5lbs between 9 months and 24 months. They really do slow down a ton when they start moving. She started crawling in her 9th month, so that's prolly why her weight slowed then.
Now inches? Hehe, she's still in the 99th percentile for height and weight, so she's just been elongating.
If your child got mobile earlier, I could definitely see the weight slowing down earlier.
SAHM to Magnolia May (09/10) and Luke Russett (04/13) and wife and best friend to my airman.