Week-by-Week Overview
Here is what to expect across sleep, feeding, and development in your newborn's first 12 weeks.
| Week | Sleep | Feeding | Development |
|---|---|---|---|
| 1–2 | 16–18h/day, 1–3h stretches | 8–12x/day, every 2–3h | Focuses on faces ~12 inches away |
| 3–4 | 15–17h/day | 8–10x/day | Starts tracking movement |
| 5–6 | 14–16h/day, some 3–4h stretches | 7–9x/day | Social smiling begins |
| 7–8 | 14–16h/day | 6–8x/day | Cooing, responds to voice |
| 9–10 | 14–15h/day, may do 4–5h stretch | 6–8x/day | Reaches for objects |
| 11–12 | 13–15h/day | 5–7x/day | Laughs, tracks objects 180° |
Safe Sleep: The ABCs
Safe sleep is the single most important thing you can do to reduce the risk of SIDS (sudden infant death syndrome) and sleep-related infant death. The AAP's ABCs make it easy to remember.
🛏️ Always: Alone · Back · Crib
Every sleep, every time — place your baby Alone, on their Back, in a Crib (or approved bassinet/play yard). No exceptions.
- No soft bedding — bare sleep surface only. No pillows, loose blankets, bumpers, or positioners.
- No inclined sleepers — the FDA has banned sleepers with angles over 10°. Only use CPSC-approved products.
- Room-share, don't bed-share — keep baby's sleep surface in your room for at least the first 6 months.
- Room temperature 68–72°F (20–22°C). Use a sleep sack instead of blankets.
- Pacifier at sleep times after breastfeeding is established (around 3–4 weeks) reduces SIDS risk.
Feeding Your Newborn
Breastfed Babies
Breastfed newborns typically feed 8–12 times per 24 hours. In the first few days, your colostrum — a thick, nutrient-dense pre-milk — is exactly what your baby needs in tiny amounts. Full milk supply arrives around days 3–5. Signs your breastfed baby is getting enough: 6+ wet diapers and 3+ dirty diapers per day by day 4–5, gaining weight after the initial loss, and seems satisfied after feeds.
Formula-Fed Babies
Formula-fed newborns typically take 1–3 oz per feed in the first week, increasing to 2–4 oz by weeks 2–4. Formula digests more slowly than breast milk, so formula-fed babies may go slightly longer between feeds (2.5–3.5 hours). Always prepare formula according to manufacturer instructions and sterilize bottles in the first months.
Hunger Cues
Feed on demand — watch for early hunger cues: rooting (turning head, searching), sucking on hands or fingers, opening mouth. Crying is a late hunger cue; a very upset baby is harder to latch. If your baby is crying inconsolably, try calming them first before offering a feed.
When to Call the Doctor
Most newborn concerns are normal, but call your pediatrician immediately if you notice any of the following:
⚠️ Seek Medical Attention For:
Fever over 100.4°F (38°C) in a baby under 3 months — this is always a medical emergency requiring immediate evaluation.
- Fever >100.4°F (38°C) rectally in a baby under 3 months — go to the ER immediately
- Not eating — refusing feeds or eating significantly less than usual
- Not producing 6+ wet diapers per day after day 4–5 of life
- Jaundice (yellowing of skin or whites of eyes) with excessive sleepiness
- Difficulty breathing, grunting, or nostrils flaring with each breath
- Blue or grayish color around the lips or fingertips
- Umbilical cord stump is red, swollen, or has pus or a foul smell
Week-by-Week Newborn Guide
Newborn Articles & Guides
Frequently Asked Questions
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