Besides the major physical milestones that take place in the first six months of Baby's life, there's more happening with Baby's learning. Learn what's happening with Baby's brain development week by week in month 4, 5 and 6.
Baby's becoming wigglier—with cuter babbles to match! In these months, she's also learning lots about object permanence and emotions (yours and her own). Plus, she's even working on some early math skills! See what's happening each week.
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