Infant in 2001: WHO exclusive BF · 433

From one month to twelve months — motor milestones, first foods, attachment deepening, and emerging sleep patterns. The infant year spans rapid motor, cognitive, and social growth from dependent newborn to mobile, communicative near-toddler. Piaget's sensorimotor stage and later attachment research frame this period as active learning through movement, mouth, and reliable caregivers.

WHO complementary feeding guidance, AAP safety standards, and global vaccination schedules intersect with daily parenting choices. Many roll front-to-back between 4–6 months; wide normal range exists — tummy time supports development. WHO and AAP recommend around six months when sitting with support and showing interest — not before four months.

Mild drooling and gum irritation yes; high fever usually has another cause and needs medical review. When can infants sleep through the night? Some sleep longer stretches by 6–9 months; many still wake for feeds or comfort — biologically normal. Daily supervised tummy time builds neck and shoulder strength for crawling and reduces flat head spots.