Sleep
Newborn sleep, and why nothing works yet
Babies in the first months have no body clock, short sleep cycles and no capacity for routine, which explains most of it.
The first three months are frequently described as a period in which parents should establish good sleep habits, which is advice given about a creature not yet physiologically capable of having them.
What is actually happening
Newborns have no established circadian rhythm at birth.
It develops over the first months, with the melatonin rhythm emerging around eight to twelve weeks and consolidating over the following months.
Which is why a two-week-old is as likely to be awake at three in the morning as three in the afternoon, and why nothing you do will change that in week two.
Newborn sleep cycles are around fifty minutes compared with ninety or so in adults, meaning more frequent transitions and more opportunities to wake.
A greater proportion of newborn sleep is active sleep, the precursor to REM, during which babies twitch, grimace, make noises and move — and during which they are asleep, despite appearing to be waking.
Which means picking a baby up at the first noise frequently wakes a sleeping baby.
Total sleep and its distribution
Newborns sleep a great deal in total — commonly fourteen to seventeen hours in twenty-four — distributed in short blocks around the clock.
The problem is never the total; it is the distribution and the fact that adults cannot function on fragments.
Longest sleep periods gradually lengthen over the first months, and the timing shifts towards night.
Feeding frequently at night is normal and necessary in the early weeks, and night feeds support milk supply because prolactin levels are higher at night.
What helps in the first weeks
Modest and worth doing.
Bright light and normal noise and activity during the day, and dim light and quiet for night feeds, which supports the developing rhythm.
Feeding responsively, since a hungry baby will not sleep.
Keeping the baby's daytime environment stimulating enough that day and night differ.
Getting outdoors, which helps both baby and adult.
And accepting the sleep where it happens rather than fighting for it to happen in a particular place, within the safe sleep guidance discussed elsewhere on this site.
What does not work yet
Routines in the first weeks, which most babies cannot follow and which mostly generate frustration.
Attempting to keep a baby awake during the day to sleep better at night, which produces an overtired baby who sleeps worse.
Sleep training, which is not appropriate in the newborn period under any approach.
Comparing with other babies, which vary enormously.
And any product promising better newborn sleep, which is a market built on desperation.
The fourth trimester idea
A useful frame rather than a clinical concept.
Human infants are born comparatively immature and spend the first months adapting to an environment radically different from the uterus.
Which is why the things that soothe are the things that approximate it: containment, movement, warmth, sound and closeness.
Swaddling, where used, must follow safe practice — snug on the arms and loose at the hips, always on the back, stopped as soon as the baby shows any sign of rolling, and not used with bedsharing.
Carrying in a sling, correctly positioned with the airway clear and the face visible, is effective and has some evidence for reducing crying.
Getting through it
Practical rather than optimistic.
Sleep when you can rather than when it is convenient, including during the day.
Share the nights if there are two of you, with shifts rather than both being woken by everything — one person getting a four-hour block is worth considerably more than both getting fragments.
Accept practical help specifically, since offers of help are vague and requests are not.
Lower the standard on everything else for a period.
And know that the first six weeks are generally the hardest, that things change measurably by three months, and that the version of exhaustion you are in now is not the permanent state it feels like.
When to ask for help
A baby who is very difficult to wake, feeding poorly, or unusually floppy or irritable needs urgent assessment.
Persistent noisy breathing, pauses in breathing beyond the normal brief irregularity, or blue colour need urgent attention.
And a parent who is not coping, who is having frightening thoughts, or who feels unable to care for the baby should tell someone today — this is common, it is treatable, and it is not a judgement on them.
General information only, not medical advice. Consult your health visitor or a qualified clinician about your baby's sleep, and seek urgent help if you are struggling to cope.
