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Every healthy baby is born with a set of automatic, hardwired reflexes — Moro, rooting, grasp, stepping, and more. Here’s what each one does, why it exists, when it fades, and why pediatricians treat them as a window into a developing nervous system.

Baby growth spurts cause sudden intense hunger, fussiness, and disrupted sleep for 2–5 days at a time. Here's the complete guide: when they happen, every sign to recognize, what to do, and why the clothes that fit last week suddenly don't.

The average newborn weighs 7 lbs 11 oz at birth, but healthy ranges are wide. Here's the complete guide to birth weight, the normal post-birth weight drop, what healthy gain looks like month by month, and how to interpret percentiles.

Teething typically begins between 4 and 7 months, but the range of normal is wide. Here's the complete timeline, the symptoms that are genuinely caused by teething and those that aren't, and the relief methods that actually work.

The first social smile usually arrives between 6 and 8 weeks and is one of the most significant milestones of the first year. Here's the full science behind when babies start smiling, what triggers it, and how to encourage it.

The 3-month mark brings some of the most exciting developments of the first year. Here's a complete guide to physical, social, communication, and sleep milestones at 3 months — and when to speak to your pediatrician.

Newborn vision is more limited than most parents realize. Here's exactly what babies can see at birth, the full visual development timeline through 12 months, and how to support healthy eyesight from day one.

Head control is baby's first major physical milestone. Here's the full timeline of when it develops, how tummy time accelerates it, and what signs to watch for — so you can support your baby every step of the way.