Week 6 at a glance
Week 6 is statistically the peak crying week for most newborns, but also marks the 6-week checkup for baby and the postpartum review for the birthing parent. First true social smiles are common this week. After week 6, crying typically begins to ease gradually.
Week 6 is a milestone in several ways. Socially, most babies reliably produce their first true social smiles this week — full face, in response to your voice and gaze. This is one of the most rewarding moments of early parenthood and worth watching for.
Alert windows are now 60–90 minutes. Baby may track a moving object briefly with their eyes, and head control is improving, though still requires full support. Continue tummy time to build the neck muscles needed for later milestones.
{callout("info", "Social smiles — what to look for", "A social smile uses the whole face, including the eyes. It's triggered by your face or voice, not gas or reflex. If you haven't seen one by week 8–10, mention it to your pediatrician.")}A 6-week growth spurt often overlaps with this week's general fussiness, triggering another round of cluster feeding. Breastfed babies may feed almost continuously in the evenings. Formula-fed babies may take more per feed or seem unsatisfied sooner.
Feeding has usually become more established by now, but supply concerns and latch questions are still common. Lactation support is available well beyond the first few days — a lactation consultant can help even at 6 weeks.
If you're combination feeding (breast and formula), your pediatrician or lactation consultant can help you balance the two to protect supply while ensuring adequate intake.
Total sleep: 13–16 hours per 24 hours. The longest sleep stretch may be inching slightly longer (3–4 hours) for some babies, but many are still waking every 2–3 hours overnight. This is normal and age-appropriate.
Many parents notice increased daytime nap difficulty this week due to fussiness and overtiredness. A short wind-down routine before naps — dim the lights, gentle shushing, a brief feed — can help signal sleep. Keep expectations realistic: 5-week-olds and 6-week-olds aren't developmentally ready for schedule-based sleep.
Read our guide on newborn sleep by week for what the next few weeks typically look like.
The 6-week checkup is one of the most important visits of infancy. Bring questions — don't be embarrassed by anything. Common topics include: feeding amounts, sleep safety, when to start vitamin D (if breastfeeding), and postpartum mood for the birthing parent.
Postpartum depression affects up to 1 in 5 birthing parents. The 6-week visit includes a standard mood screen. If you're feeling overwhelmed beyond what feels manageable, or having intrusive thoughts, tell your provider honestly.
⚠️ When to call your pediatrician
inconsolable crying every day for 3+ hours · baby unable to be calmed by any method for extended periods · poor weight gain · any sign of illness (fever, persistent cough, unusual pallor) · you or your partner are struggling with mood or intrusive thoughts — seek help promptly
Week 7 is the turning point for many families — the worst of the crying typically begins to ease. Head to week 7 for what changes, and to our Newborn Hub for the full 12-week guide.
Week 6 is statistically the peak of newborn crying in most studies. Colic-like fussiness, sleep deprivation accumulating over 6 weeks, and the physical demands of feeding all converge. This doesn't mean something is wrong — it means you're at the hardest point, and it gets easier from here. The 6-week checkup is also a good time to screen for postpartum depression.
Your baby's weight, length, and head circumference are measured. The doctor checks development, reflexes, and feeding. For the birthing parent, this is also the postpartum checkup — a chance to discuss recovery, mood, contraception, and return to activity. Don't minimize your mental health symptoms if asked.
Yes. The 45-minute nap is driven by sleep cycle length — babies surface between sleep cycles and often can't connect them back to sleep yet. This typically improves between months 3–5. At 6 weeks, short naps are normal and not something to try to fix — focus on total sleep volume and safe sleep practices.
Colic-like evening fussiness typically peaks at weeks 5–6 and gradually eases over weeks 7–12. Most babies show clear improvement by 3 months. The causes aren't fully understood, but this is a well-documented phase. Keep taking breaks when you can hand baby to another caregiver.
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1-Month-Old Development
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