Toddler Growth: Height, Weight & IQ Milestones

Toddler development at 21 months includes significant linguistic and physical milestones. Tracking height and weight percentiles helps identify healthy growth patterns and early signs of a high IQ.

Baby girl (18-24 months) in high chair, spaghetti hanging over tray

How to Make My 1-Year-Old Gain Weight

Published Jun,13 2017 | By Kelsey Casselbury

When a child fails to gain weight at the same rate as others her age and gender, it’s known as a failure to thrive. Yet, a parent might not be able to adequately tell if her child is actually suffering from this condition.