At six weeks old, your baby is starting to look less like a scrunched-up newborn and more like the round-cheeked infant you see in photos. Their face is filling out, their eyes are more alert, and you may be catching the very first hints of a real smile. This is a transitional stage where newborn quirks like flaky skin, jerky reflexes, and a curled-up posture are still present but starting to fade.
How Their Face and Body Are Changing
The puffy, squished look from birth is mostly gone by six weeks. Your baby’s head, which may have been cone-shaped or swollen after delivery, has rounded out. Their facial features are more defined, and you can start to see who they might look like. Cheeks are fuller because of the fat pads babies develop for feeding, and their skin has typically lost the reddish or purplish tint it had in the first days of life.
At this age, most babies weigh between 8 and 12 pounds, depending on their birth weight. They’ve likely gained a couple of pounds and grown about an inch since birth. Their limbs still curl inward naturally, but not as tightly as during the first two weeks. You’ll notice their fists are still clenched much of the time, though fingers occasionally splay open, especially during sleep.
Skin at Six Weeks
Six-week-old skin can look surprisingly rough. Baby acne is one of the most common things parents notice at this stage: small red or white bumps across the cheeks, nose, and forehead. It looks alarming but is painless and clears up on its own, usually within a few weeks. It’s driven by hormones the baby received before birth.
Cradle cap is the other hallmark of this age. It shows up as yellow or white scaly patches on the scalp that look greasy or crusty, sometimes surrounded by a rash. On lighter skin the rash looks pink or red; on darker skin it may appear lighter or darker than the surrounding area. Cradle cap typically starts within the first three months and clears by a baby’s first birthday. It doesn’t itch or bother your baby. The likely cause is overactive oil glands on the scalp, possibly combined with a type of yeast that naturally lives on skin.
Dry, peeling skin on the hands and feet is also still normal at six weeks, especially if your baby was born past their due date. Some babies have tiny white bumps called milia on their nose and chin, which are blocked pores that disappear without treatment.
What Their Eyes Can Do
A six-week-old can see things clearly at about 8 to 12 inches away, roughly the distance between your face and theirs during feeding. Beyond that range, the world is blurry. Their eyes may still occasionally cross, which is normal before three months as the eye muscles strengthen.
At this age, your baby is getting better at briefly locking onto your face, though smooth tracking of a moving object comes closer to three months. You’ll notice they stare intently at high-contrast patterns and edges of faces. Eye color at six weeks isn’t final either. Babies born with dark brown eyes will usually keep them, but lighter-colored eyes can continue changing for up to a year.
The First Social Smile
Six weeks is right around the time many parents see their baby’s first real smile. Before this point, every grin you’ve seen was a reflex, often triggered by gas, a full stomach, or REM sleep. Those smiles happen randomly and don’t respond to anything in particular.
Social smiles are different. They emerge around eight weeks, but some babies start as early as six weeks. You’ll recognize the shift because the smile comes in response to something: your voice, your face, or being picked up. The baby’s whole face engages, especially the eyes. These early social smiles are brief and unpredictable. You might get one after a feeding and then not see another for hours. That’s completely typical. Talking and making eye contact during calm, alert moments gives your baby the best chance to practice.
Reflexes You’ll Still See
At six weeks, your baby still has several primitive reflexes that look dramatic but are a normal part of brain development. The Moro reflex, sometimes called the startle reflex, is the most noticeable. A sudden noise or feeling of falling causes your baby to fling their arms out, arch their back, and then pull their arms in. This reflex is present in all infants during the first 12 weeks, then gradually fades, usually disappearing by six months.
The rooting reflex is still strong: stroking your baby’s cheek makes them turn toward the touch and open their mouth, searching for a nipple. The palmar grasp reflex, where your baby clamps down on anything placed in their palm, is also fully active. This grasp reflex persists through the first three months before it starts to weaken. These reflexes aren’t something to worry about. Their presence is actually reassuring, a sign the nervous system is developing on schedule.
Feeding and Sleep Patterns
A six-week-old typically feeds every two to three hours, adding up to roughly 8 to 12 feedings in a 24-hour period, including overnight. Breastfed babies tend to eat more frequently than formula-fed babies because breast milk digests faster. At this age, many babies go through a growth spurt that makes them hungrier than usual for a few days. If your baby suddenly wants to eat constantly, that’s the likely reason.
Sleep is still fragmented. Most six-week-olds have six to eight sleep periods per day, each lasting two to four hours. Total sleep across the day and night usually adds up to 14 to 17 hours. The longest stretch of sleep at night might be three to four hours, though some babies are still waking every two. There’s a wide range of normal here, and consistent longer stretches at night typically don’t emerge for another month or two.
The Six-Week Health Check
Six weeks is a standard checkpoint recommended by the World Health Organization for both mother and baby. Your baby’s doctor will weigh and measure them, checking that growth is tracking along a consistent curve since birth. They’ll look at head circumference, check the fontanelles (the soft spots on the skull), listen to the heart, and examine the hips.
The visit also screens for warning signs like poor feeding, jaundice, abnormal breathing rate, or low body temperature. For most parents, though, the six-week visit is reassuring. It’s a chance to ask about anything that looks unusual, whether that’s a persistent rash, an oddly shaped head from sleeping in one position, or eyes that seem to cross more than expected. All of these are common topics at this stage, and most turn out to be completely normal parts of early development.