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Babies grow in unique ways: The baby who sits up weeks before her peers might be one of the last to learn how to crawl. Or the 18-month-old who's still communicating with grunts and gestures suddenly bursts forth with prepositional phrases at 2 years. That's why we created this series of developmental guides.
Since babies aren't identical – thank goodness! – the guides allow for variations in stages of development. Use them to gain insight into what you're observing in your baby today and to preview what you can look forward to in the months ahead.
For information about particular milestones, click on the links below or head to the baby, toddler, or preschooler development pages.
- 1 to 6 months
- 7 to 12 months
- 13 to 24 months
- 25 to 36 months