GUIDE
Your baby is adjusting to life outside the womb. So are you. Almost everything happening right now is normal.
The first two weeks aren't about milestones — they're about survival. Here's what your newborn is actually doing developmentally, and why it matters more than any checklist.
Your newborn arrived with a set of reflexes that are genuinely impressive. The rooting reflex makes them turn toward anything touching their cheek, mouth open, searching for food. The Moro (startle) reflex makes them fling their arms out at sudden movement — it looks dramatic and can wake them from a dead sleep (which is why swaddling helps). The grasp reflex is why they grip your finger like their life depends on it.
Voluntary movement is minimal. Their head is heavy relative to their body and their neck muscles are brand new. According to the WHO's Multicentre Growth Reference Study, head control develops gradually over the first several months. Tummy time can start now — even a few minutes on your chest counts — and most babies will attempt to lift their head briefly.
These are reflexes, not voluntary skills. They're hardwired survival instincts — and they're exactly what your baby needs right now.
Your newborn's brain is about 25% of its adult size at birth and is building neural connections at a staggering rate. They're processing sensory input — light, sound, touch, temperature — and beginning to sort what's important from background noise. They already prefer human faces over objects and can recognize your voice from the womb.
Vision is blurry beyond about 12 inches — exactly the distance to your face during a feeding. That's not a coincidence. Hearing is well developed at birth. Smell is surprisingly sophisticated — your newborn can recognize the scent of your breast milk and will turn toward it. Touch is their most developed sense. Skin-to-skin contact regulates their temperature, heart rate, breathing, and stress hormones. It's not a luxury — it's medicine.
Your newborn's primary language is crying — and it's a sophisticated communication system. According to the CDC's developmental guidelines, crying is a baby's first and most important way to signal needs. You'll start to notice different cries: hungry (starts slow, builds), pain (sudden and sharp), tired (whiny and intermittent).
Talk to your baby constantly. They're absorbing the rhythm, melody, and patterns of your language. According to Zero to Three, attachment is the main event of these first two weeks. Every time you respond to your baby's cry, you're teaching them: someone is here, and they care. Those early smiles are reflexive — the real social smile is coming around 6–8 weeks.
Your newborn has a stomach roughly the size of a cherry on day one, growing to about a walnut by the end of week two. They need to eat every 2–3 hours, or 8–12 times per day. Breastfed babies will often cluster feed in the evenings. Formula-fed babies typically take about 1–2 ounces per feeding.
The metric that matters most: 6 or more wet diapers per day after day 4. That tells you baby is getting enough. Newborns sleep 16–17 hours per day, but in stretches of 2–4 hours that respect no clock. Safe sleep is non-negotiable: alone, on their back, on a firm flat surface, with nothing else in the sleep space.
tinylog makes tracking feeds and diapers effortless — one-tap logging means you can track a feed even when you're half-asleep and holding a baby.
It's normal for newborns to lose up to 7–10% of their birth weight in the first few days. They should regain it by about two weeks. Your pediatrician will be tracking this, so make it to those early weight checks.
Babies are often sleepy and calm on day one, then want to cluster feed all night on night two. It's your baby telling your body to bring in the milk supply. It's brutal, normal, and it passes.
Grunting, snorting, squeaking, irregular breathing with pauses — all typically normal. Their respiratory system is still maturing. If they're turning blue, gasping, or making a barking cough, that's different — call your pediatrician.
You'll have a well-child visit within the first week and again at two weeks. Write your questions down — sleep-deprived brain will forget everything.
