LullbeeAround four months, many babies who had started sleeping in long, glorious stretches abruptly return to waking every hour or two. It feels like something broke. The reassuring truth is the opposite, something finished being built.
It is a promotion, not a malfunction
Newborns fall straight into deep sleep. Around the fourth month, a baby's sleep reorganizes into adult-style cycles, light sleep first, deep sleep after, surfacing briefly between cycles all night long. That architecture is permanent, which is why this regression is famous, there is no going back to newborn sleep. The skill babies now have to learn is sailing through those brief surfacings without fully waking, and the ones who need help falling asleep at bedtime tend to need the same help at every surfacing.
What helps
Consistency at bedtime. Whatever conditions a baby falls asleep in are the conditions being requested at 2am. Making bedtime conditions reproducible, same room, same darkness, same sound, means the night looks the way falling asleep did. An unbroken sound floor. A continuous low noise that plays all night gives every surfacing the same soundscape the baby fell asleep to. A sound that shuts off after 30 minutes quietly removes the one landmark that was supposed to be there. Patience. Most families see the storm pass in two to six weeks as the new cycles bed in.
Every Lullbee track loops seamlessly until morning precisely for those between-cycle surfacings, and the all-night option exists for exactly this month.