The Newborn Guide

The first week (and what to expect)

The first week is mostly recovery for you and recalibration for the baby. Newborns lose 5 to 10 percent of their birth weight in the first 3 to 5 days. This is fluid loss, not a feeding problem. Most regain birth weight by 10 to 14 days. If your baby is below 7 percent loss at day 5 and gaining by the first weight check, things are working.

Day-night confusion is the dominant feeling of week 1. Babies have no circadian rhythm yet — that develops between weeks 8 and 12. What you can do early: get sunlight on their face every morning, keep daytime feeds bright and chatty, keep nighttime feeds dim and quiet. You will not "train" a newborn to sleep through the night, but you will lay the groundwork for circadian development.

The umbilical stump falls off between days 7 and 21. Some weeping or a drop of blood when it detaches is normal. Real signs to flag: red skin extending outward from the stump, fever, foul smell. Otherwise leave it alone — no rubbing alcohol, no tape, no covering.

The growth check schedule

Your pediatrician will see the baby at 3 to 5 days, then 2 weeks, then 1 month. Those visits exist to catch weight loss, jaundice, and feeding issues — they are not optional. Bring your feeding log (or your honest best guess). The questions that matter at each visit: weight trend, wet diaper count, stool color and frequency, feeding cues your baby is showing, any concerns from the parents.

Newborn sleep and wake windows

Total daily sleep in weeks 0 to 8: 14 to 17 hours. Total daily sleep in weeks 8 to 12: 13 to 16 hours. These are wide ranges because babies vary, but the average drops gradually, not in a single drop.

The metric that matters most in the newborn phase is not total sleep — it is the wake window. A wake window is the awake stretch between two sleeps, including the feed and the burp and the diaper change. Going past the window almost always produces overtiredness, which looks like a second wind followed by full screaming.

If the window feels short, it is. A newborn really does need to sleep again 45 minutes after waking up. The mistake parents make is treating wakefulness as the default state — a newborn's default is sleep, with brief awake periods for feeding and (sometimes) a 5-minute play interval.

Safe sleep, every time

The American Academy of Pediatrics has held the same line since 1992 and refreshed it in 2022: on the back, on a firm flat surface, in a bare crib or bassinet, with no loose bedding, bumpers, or sleep positioners. Sharing a room (not a bed) for the first 6 months is associated with a reduced SIDS risk. Room temperature in the 68 to 72°F range with one layer of sleep clothing is the recommended setup.

Swaddling is fine until the baby shows signs of rolling — usually 8 to 12 weeks. Once you see any roll, swaddle goes. Here is the cold-turkey vs gradual debate, settled, including how to time the transition for the day-vs-night sleep split.

Feeding: how much, how often

Breastfed newborns feed 8 to 12 times in 24 hours in the first 4 weeks. Formula-fed newborns take 1.5 to 3 ounces every 2 to 3 hours in week 1, growing to 2 to 4 ounces every 3 to 4 hours by month 1. The cluster — 4 to 8 feeds tightly packed in a 3-hour window, usually in the evening — is normal during growth spurts at days 7 to 10, weeks 2 to 3, and weeks 5 to 6.

Watch the baby, not the clock, in the first month. Hunger cues come in this order: rooting and lip-smacking, then sucking on hands, then fussing, then crying. Crying is a late cue. Feed on the early cues and the feed is calmer; feed during full crying and the baby has to settle before they can latch, which adds 5 to 10 minutes to every feed.

If you are bottle-feeding (formula or pumped milk), paced feeding matters more than people say. A bottle pouring straight into a horizontal baby's mouth delivers more than the baby can regulate, which produces gas, spit-up, and false hunger cues 20 minutes later. Slower nipple, more upright position, brief pauses every 30 seconds.

Spit-up is normal up to a point. Roughly half of healthy newborns spit up at least once a day. The amount almost always looks bigger than it actually is — a tablespoon of milk spreads across a much wider patch. Reflux that affects feeding, weight gain, or sleep is different and worth a call.

Crying and the witching hour

Newborns cry an average of 2 to 3 hours per 24-hour day in the first 6 weeks. The crying peaks around week 6, then steadily decreases through week 12. Pediatric researchers call this curve the "PURPLE crying" period — the name is an acronym for its features (Peak, Unexpected, Resists soothing, Pain-like face, Long-lasting, Evening). It is normal, and it ends.

The witching hour is a specific subset of newborn crying — the evening stretch (usually 5 PM to 11 PM) where babies are inconsolable for no obvious reason. It is overstimulation, not pain.

The fast-acting moves: dim everything, white noise on (loud, not gentle — 65 decibels, which is louder than most parents are comfortable with), tight swaddle, sideways or stomach hold (not back — yes, this is the Karp "5 S's" set), gentle rocking, pacifier. Most babies settle on the 4th or 5th element. If none of it works for 20 minutes, hand the baby off and take 10 minutes away — both you and the baby are usually in a feedback loop at that point.

Crying that signals something different from normal newborn fuss: a sudden high-pitched cry, an inconsolable hour with no break, crying that worsens with movement, crying with arched back and pulled-up legs (intussusception is rare but presents this way). These get a call.

Body weirdness that is usually fine

Newborns do strange things with their bodies. The honest list of what is normal:

Hiccups

Multiple times a day, often after feeds. Diaphragm reflex, not painful. Resolves in 10 to 15 minutes. Do not give water or "hiccup remedies" — they do not work and they displace milk. Here is the short list of when hiccups actually matter.

Sneezing

3 to 10 sneezes a day, with no fever and no congestion. The nasal passages are tiny and clear themselves by sneezing. Not a cold. Here is how to spot the rare real cold (which always needs a call in babies under 3 months).

Grunting and straining in sleep

Loud grunting, red face, straining as if pushing — usually while half-awake. Pediatricians call it "grunting baby syndrome." It is the immature ability to coordinate the abdominal-floor muscles for stooling. It resolves between 8 and 12 weeks. Three things parents do that make it worse — none of them are obvious.

Reflex movements

The Moro (startle) reflex — arms fling outward, then back to center — is one of the most-checked reflexes at the newborn exam. It is supposed to be there. It fades between 4 and 6 months. The rooting reflex (turning toward a touch on the cheek) and the palmar grasp (closing the fist around a finger) are similar — present at birth, gone by 4 to 6 months. Their presence is a good neurological sign, not a problem.

Acne, milia, cradle cap

Newborn acne shows up between weeks 2 and 6 — small red bumps on the face from maternal hormones still in circulation. Resolves on its own by 3 to 4 months. Milia (tiny white bumps, usually on the nose) is plugged pores, resolves the same way. Cradle cap (yellow flaky scalp) is seborrheic dermatitis, common, harmless, treated with a soft brush and gentle oil if it bothers you.

Eye crossing

Newborn eyes do not coordinate consistently until 4 to 6 months. Brief crossing or one eye drifting is normal up to month 3. Persistent crossing past month 4, or a single eye that never tracks, gets mentioned at the next well-check.

Diapers and what comes out

Newborns use 10 to 12 diapers a day in the first 4 weeks, dropping to 8 to 10 by month 3. Wet diaper count is the single fastest signal of adequate intake — 6+ wets per 24 hours by day 5 onward means feeding is working.

Stool color changes are the part nobody warns parents about. The sequence:

1. Days 1 to 3: black, tarry meconium (sticky)
2. Days 3 to 5: transitional dark green
3. Day 5 onward, breastfed: mustard yellow, seedy, runny — feed-related; can happen multiple times a day or once every 4 to 7 days, both are normal after the first month
4. Day 5 onward, formula-fed: tan to brown, paste-like; usually 1 to 3 times a day

Three poop colors that need a same-day call: pure black after week 1, white or chalky pale, and red or fresh blood streaks. Green is almost always fine in newborns. The rest of the rainbow is fine if the baby is feeding well and growing.

Diaper rash in the first 12 weeks is usually irritant (just contact) and resolves with frequent changes, a few minutes of air time, and a zinc oxide barrier paste. Anything that does not improve in 3 days, or that has bright-red satellite spots around the edge, is probably yeast and needs a different treatment.

Milestones in the first 12 weeks

The first 12 weeks are quieter on milestones than parents expect. Most early development is internal — gut, immune, neural pruning. The visible markers that show up:

The CDC updated its milestone checklist in 2022 to reflect what 75 percent of babies do at each age, not what 50 percent do. The change meant fewer false alarms but also more confusion among parents and pediatricians used to the older charts. The 2022 update explained — what changed, why, and how to read the new chart without panicking when your kid is slow on one item.

When to actually call the pediatrician

The list of things that genuinely need a same-day call in a baby under 3 months is short. Memorize it; ignore the longer lists that exist mostly to keep liability lawyers happy.

Everything else: call the office line during business hours for non-urgent advice. Most pediatric offices have a nurse triage line specifically for "is this normal." Use it. The cost of one extra call is nothing; the cost of one missed real problem is everything.