8 Month Sleep Regression

The eight-month one is the motor one: a baby who has just learned to sit, crawl and pull herself upright will practise all three in the cot, at night, whether or not anybody wants her to. Underneath the practice is separation anxiety, which begins in the second half of the first year and can run for months. Both are ordinary, both are developmental, and neither is caused by how she has been settled up to now.

The specific problem this age hands parents is narrow enough to answer directly. She stands up, cannot work out how to get back down, and cries at you from a standing position. That is a daytime skill she has not finished learning, and it is fixed in daylight rather than at midnight.

The word, and what the sources actually cover

Nobody this site is allowed to cite — the NHS, the American Academy of Pediatrics, the peer-reviewed literature — uses the term regression, publishes the list of ages, or puts a duration on any of it. Two things are published instead: when the skills usually arrive, and that frequent night waking at this stage is developmentally appropriate rather than a fault. So treat the ages as a folk map of when nights commonly get harder, drawn by parents, useful for exactly that and not a finding about your baby. The regression timeline puts all six on one arc and marks which parts of each are measured.

What is developing, and why it costs you nights

The AAP's own account of this window is busy. Most babies sit without support by about eight months and are in constant motion. Crawling is a skill usually mastered somewhere between seven and ten months — and some children never crawl at all, scooting or slithering instead, which the AAP treats as unremarkable rather than a problem. Then, as it puts it, babies pull themselves to a standing position every chance they get.

Every chance includes the dark ones. A baby practises a new skill when she has nothing else to do, and a cot at one in the morning is the emptiest diary she owns. She surfaces at the end of a sleep cycle — which she has been doing since about four months, and which the four-month page explains — and instead of settling she finds herself upright with her hands on the rail, wide awake and pleased about it.

Getting up is the easy half. Lowering yourself under control needs a bent knee and a hand walking down the bars, and it arrives days or weeks after standing does. In between, she is stuck: standing, tired, unable to reverse, calling for the one person who can put her down.

The answer, and it is a daytime one

Practise getting down on the floor, in daylight, repeatedly, until it is dull. Stand her at the sofa or a low table, then help her fold one knee and lower onto her bottom, hand over hand, several times. Do it when she is in a good mood and stop before she is annoyed. Most babies work it out within a fortnight of being shown it enough times, and a baby who can get herself down at four in the afternoon does not need you to do it at four in the morning.

At night, keep it boring. Lay her down, say the same short thing, and leave. Then do it again, and again, without turning it into a game or a conversation — the aim is that being put down is the least interesting thing that has ever happened to her, so that doing it herself becomes the easier option.

Floor time in the day is doing a second job as well. Crawling, cruising and pulling up all get practised somewhere, and the more of it happens on the carpet with an audience, the less of it has to happen alone in the dark.

Separation anxiety, running underneath all of it

Beginning in the second half of the first year, separation anxiety can cause many nights of disrupted sleep and can last for several months. That is the AAP's description, not a folk one: a child waking several times and crying anxiously for a parent. It is a normal stage in emotional development, and it usually fades somewhere around the second birthday.

It changes what the waking means. A baby who cried at eight weeks because she was hungry now cries because you are not there and she has recently worked out that you exist when you are not in the room. Going in is not reinforcing anything in the sense people mean when they warn you about it; you are answering a question she has genuinely asked.

What helps, in the plain sense: a predictable goodbye rather than a slipped-away-while-she-was-distracted one, some practice at short separations in daylight, and the same short order of events before every sleep so that bedtime is recognisable. What does not help is changing the approach every three nights, because the thing she is short of is predictability.

The cot, at the age she learns to pull up

This is the fortnight to look at the cot properly, ideally before she surprises you standing in it.

The mattress goes to its lowest setting — a baby who can pull up can lean over a rail that was safe when she could only lie down. Nothing stays in the cot that could be climbed on or that could cover her face: no bumpers, no pillows, no stack of muslins, no large toys. Babies still go down on their back for every sleep, day and night, on a firm flat mattress, in a cot clear of blankets, pillows, bumpers and soft toys, in your room for at least the first six months. Nothing weighted goes on or over a sleeping baby. Where she travels after you put her down, in an empty cot, is hers — the rule is about how the sleep starts and what is in there with her.

Do not lose a nap to a bad fortnight

Two naps hold through this age for most families. Awake stretches at eight to ten months run somewhere around two and a half to three and a half hours, on two or three naps — the wake windows by age guide explains where those bands come from, and the seven and eight month wake windows page and the wake window calculator put them on your clock.

The trap is obvious once it is named: nights fall apart, naps get short and cross, and dropping one looks like the fix. It rarely is. Cutting daytime sleep during a stretch when she is already short of it usually buys a worse evening, and if the change does coincide with an improvement you will never know which of the two did it. If the third nap has genuinely been refused most days for a couple of weeks, that is the three-to-two nap transition, which commonly lands somewhere between six and nine months, and the nap transition checker will tell you to wait as readily as it will tell you to change anything.

How long it lasts, and what comes next

There is no published duration, so there is no honest number. Parents commonly report two to six weeks at this age; that is unsourced, and it is here only so the figures you have read elsewhere have some context. The AAP does put a shape on the separation anxiety part — several months of it, fading around the second birthday — which is longer than any regression chart admits and easier to live with than the chart, because it explains the wakings that arrive in the months when nothing is supposed to be happening.

What tends to come next is standing turning into cruising and then walking, and the twelve-month page covers that, along with the nap question that starts to look tempting around the first birthday. If you have arrived here from the six-month page, the thing that has changed since then is simply the strength: at six months she wanted to sit, and now she can stand up and shout about it.

What is not a phase

A baby who cannot be settled at all, who is unusually sleepy, feeding poorly, not gaining weight, or whose cry does not sound like her usual one is not a chart problem, and neither is a worry that simply will not go away. That is a conversation with your pediatrician or health visitor. This page is general information, not medical advice, and it cannot see your baby.