Baby Development Milestones: Brain, Bone & Neck Growth Guide

Baby development spans from conception to birth and beyond, encompassing critical milestones in brain, bone, and skull growth. Average infant weight gain and growth spurts vary by month.

Toddler boy playing with dog

Development of Your 14-Month-Old

During the first year, your baby grows from a completely dependent newborn into a mobile, curious toddler. The toddler period lasts from around 12 months to 36 months of age. During this time, your child learns through movement, exploration and manipulation.

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