Newborn Week 1: What to Expect
Your baby's development, feeding, sleep, your postpartum body, mental health, and what to watch for this week.
What your baby looks like at week 1
Your baby has likely lost 5–10% of birth weight by day 3–5 (totally normal — milk supply is just coming in and they're shedding fluid). Skin is still wrinkly, often peeling, sometimes blotchy or yellow-tinged (mild jaundice peaks around days 3–5). Head may look cone-shaped from delivery; that rounds out in days. Umbilical cord stump is still attached, dark, and dries over the next 1–3 weeks. Eyes can appear puffy from delivery. You may notice tiny white milia bumps on the nose and infant acne starting on the cheeks. Genitals can be swollen for a few days from maternal hormones.
Baby's development this week
Mostly reflexes. The startle (Moro), rooting, sucking, palmar grasp, stepping, and Babinski reflexes are all working. Vision is blurry at any distance beyond about 8–12 inches — exactly the distance between your eyes and theirs during feeding. Newborns prefer high-contrast black-and-white patterns and human faces over anything else. They cannot smile socially yet (any grins are gas or reflex). Hearing is fully developed at birth — they recognize your voice from the womb. They cannot regulate their own body temperature; skin-to-skin is the warmest, calmest place for them.
Feeding at week 1
Feed every 1.5–3 hours, day and night — 8–12 feeds per 24 hours. Newborns wake themselves to feed when hungry; if they don't, wake them at the 3-hour mark for the first 2 weeks until birth weight is regained. Breastfeeding babies usually take 15–40 minutes per feed (one or both breasts); bottle-fed babies take 1.5–2 oz per feed. Watch for hunger cues: rooting, hand-to-mouth, lip-smacking, fussing. Crying is a late hunger cue — try to feed before that. Wet diaper count by day 5 should be 6+ per day. Yellow seedy stools after milk transitions in around day 4–5.
Sleep this week
14–17 hours of sleep per 24 hours, but only in 2–4 hour stretches at most. No day/night rhythm yet — circadian rhythm doesn't develop until around 6–8 weeks. Wake windows are very short: 45–60 minutes max, often less. Most newborns sleep best on a parent's chest, swaddled, or in a swing — though all sleep MUST be supervised unless flat on their back in an empty bassinet or crib (Safe Sleep ABCs: Alone, Back, Crib). Swaddling is great for this week; many babies sleep longer when wrapped snugly.
How your body is doing
If you delivered vaginally: bleeding (lochia) is heavy red the first 3–5 days. Perineum is sore. Cramping ("afterpains") when nursing — that's your uterus shrinking. If you had a C-section: incision pain controls energy and movement; you're tracking pain meds on a schedule. Either way: you're exhausted, leaking milk, sore, possibly engorged by day 3–5 when milk comes in. Night sweats from hormone shifts are universal. Hemorrhoids and constipation are common. Postpartum visit is at 6 weeks but call for any concerns sooner — that's not how recovery works in 2026.
Your mental health this week
This is the "baby blues" window for ~80% of new moms. Crying without knowing why, mood swings, feeling overwhelmed, brief sadness — peaks around day 3–5 when milk comes in and hormones crash, usually lifts by week 2. If symptoms last longer than 2 weeks, intensify, or include thoughts of harming yourself or the baby, that's postpartum depression or postpartum anxiety — not baby blues. Call your OB or use the Edinburgh Postnatal Depression Scale (EPDS) screening. Help is available and effective.
When to call the pediatrician
Call the pediatrician for: fever ≥100.4°F rectal, refusal to feed, fewer than 6 wet diapers per day after day 5, lethargy (won't wake for feeds), yellow color spreading below the chest (worsening jaundice), labored breathing (60+ breaths per minute, grunting, retractions), umbilical cord smell or pus, projectile vomiting (not spit-up — projectile means it shoots across the room).
Survival tips for week 1
Sleep when the baby sleeps is not just a cliché — it's survival. Accept every offer of help: meals, laundry, holding the baby while you shower. Set up a feeding station with water, snacks, phone charger, burp cloths within arm's reach of where you nurse most. Lower every standard you can — house can be messy, friends can wait, dinner can be cereal. The first week is about keeping baby fed and yourself functional, nothing else.
For your partner
Take over everything that isn't feeding: diaper changes, burping, swaddling, household tasks, gatekeeping visitors. If mom is breastfeeding, you handle every other physical care task so she can rest between feeds. Bring water and snacks during nursing sessions. Sleep in shifts if you can — even 4 hours of uninterrupted sleep changes a person's mood radically.
Pediatric visits this week
First pediatric visit is usually at 3–5 days old (weight check, jaundice check, feeding assessment). Then again at 2 weeks. Bring questions written down — you will forget everything otherwise.
Gear focus
Bassinet next to your bed (AAP-recommended for first 6 months), 4–6 swaddles, burp cloths everywhere, nursing pillow if breastfeeding, bottle warmer if pumping/formula, a thermometer that is rectal-capable (the only accurate reading for newborns), nipple cream (lanolin or Earth Mama), nursing pads.
Is this normal?
If your baby cries a lot, sleeps in 90-minute cycles, eats every 2 hours, has explosive yellow poops, and looks nothing like the chubby babies on Instagram — they are completely, statistically, beautifully normal. The first week is brutal. Survive it. Week 2 gets marginally easier. Don't take Instagram comparisons seriously; you're seeing one curated moment from a parent who looks just as tired as you do.
Track your baby's wake windows
Newborn wake windows are short and shift weekly. The free Wake Windows Calculator gives you the right window for any age and helps prevent overtired meltdowns.
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