
Many parents of nine-month-old babies worry about their child being a light sleeper. It is important to note that all babies are light sleepers and heavy sleepers, just like adults. However, babies have shorter sleep cycles than adults, spending twice as much time in light sleep stages. This means that they are in a light state of sleep twice as often as grown-ups. Babies who are light sleepers may wake up more often, and being able to settle themselves back to sleep without intervention is important. This can be achieved by teaching them to fall asleep independently, without props such as pacifiers, rocking, or feeding. Additionally, creating a consistent bedtime routine and using white noise or room-darkening blinds can help light sleepers get better sleep.
| Characteristics | Values |
|---|---|
| Sleep cycle | Babies have shorter sleep cycles than adults |
| Sleep stages | Babies spend twice as much time in light sleep stages than adults |
| Sleep props | Babies may rely on sleep props such as pacifiers, rocking, or feeding to fall asleep |
| Self-soothing | Babies who can self-soothe can fall back to sleep more quickly |
| Environmental factors | Noise, light, and movement can easily disturb a light sleeper |
| Sleep environment | A quiet and dark sleep environment may improve sleep |
| White noise | White noise or neutral sounds can help mask disturbing noises |
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What You'll Learn

Babies have shorter sleep cycles than adults
A 9-month-old baby being a light sleeper is a common concern for many parents. While there could be many reasons for this, one significant factor is that babies have shorter sleep cycles than adults.
Sleep is essential for a baby's growth and development, and understanding their sleep cycles can help parents manage their expectations and address any sleep-related issues. The sleep cycle of infants differs from that of adults in terms of duration and the type of sleep experienced.
Firstly, babies' sleep cycles are shorter in duration. While adults typically experience sleep cycles of around 90 minutes, babies' sleep cycles are usually about 40 minutes long. This shorter cycle contributes to babies waking up more frequently, as they may complete a full sleep cycle and need help getting back to sleep.
Secondly, the composition of the sleep cycle differs between babies and adults. Babies spend more time in REM (rapid-eye movement) sleep, which is a lighter and more active type of sleep. Adults, on the other hand, have more non-REM sleep, characterised by deeper, quieter sleep where they lie still and breathe deeply. The higher proportion of REM sleep in babies makes them more prone to waking up easily.
As babies grow, their sleep patterns gradually change. From around three months onwards, babies start developing more distinct day and night sleep patterns, with more sleep occurring at night. Between the ages of three and six months, babies begin to have less 'active' sleep and more 'deep' sleep, with the deepest sleep occurring at the start of their sleep cycles. By the time they reach five years of age, their sleep architecture, or the time spent in each sleep stage, starts to resemble that of adults, with sleep cycles lasting about 90 minutes.
To help your 9-month-old sleep more independently and deeply, there are a few strategies you can try. Firstly, ensure they have the skills to self-soothe, as this enables them to settle themselves back to sleep without your intervention. Establishing a consistent bedtime routine can aid in this process. Additionally, consider your baby's sleep environment. External factors such as noise, light, and temperature can impact their sleep. Room-darkening blinds or curtains can be helpful, as can creating a neutral sound in the room with a fan or a radio set between stations.
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They are dependent on sleep props
If your 9-month-old is a light sleeper, it could be because they are dependent on sleep props. Sleep props are anything that your baby needs in order to fall asleep, such as a pacifier, being rocked, or fed to sleep. These props become an essential part of the sleep process, so whenever your baby wakes up, they need the prop again to fall back asleep. The more dependent they are on these sleep props, the harder it is for them to develop self-soothing techniques that allow them to fall asleep independently.
To help your baby become less reliant on sleep props, you can try to teach them to fall asleep on their own, without any outside help. This may take a few tough nights, but it will be worth it in the long run. You can also set up a consistent bedtime routine, so your baby knows what to expect. It's important to remember that all babies go through light and deep sleep stages, and some babies just spend more time in the light sleep stage. You can't force your baby into a deeper sleep, but you can teach them to fall back asleep on their own when they do wake up.
If you're unsure where to start, consider reaching out to a sleep coach or therapist. They can provide you with an individualized plan and more technical knowledge to help your baby become a better sleeper. Remember, it's normal for babies to undergo periods where their sleep patterns change, and it's nothing to worry about. With a little help and time, your baby's sleep will improve.
- Turn down the thermostat at night and use room-darkening blinds or curtains to block out light.
- Create neutral background noise with a fan or radio to mask other noises.
- Move your baby to their own room if you haven't already. This can reduce interruptions from family members and encourage self-soothing.
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They don't know how to fall back to sleep
Babies who are rocked, fed, or given a pacifier to sleep tend to develop a dependency on these external factors to fall asleep. This means they don't know how to fall back to sleep without them.
Sleep training, also known as sleep teaching or self-soothing training, can help babies develop the ability to fall back to sleep on their own. This can be done by putting your baby down for a nap or bedtime when they're tired but not overtired. Signs of tiredness include rubbing their eyes, yawning, looking away, or fussing. If they're overtired, it will be harder for them to fall asleep.
Babies should also be taught to fall asleep independently in their cribs. This will enable them to resettle themselves each time they stir at night. A consistent bedtime routine with predictable activities, such as dinner, bath, a book, a song, and dimmed lights, can help with this.
Additionally, creating a relaxing environment in the baby's room can aid in them falling back to sleep. This can be achieved by using room-darkening blinds or curtains and turning down the thermostat. A fan or radio set between stations can also create a neutral sound that masks other noises.
It's important to note that sleep disturbances in 9-month-olds could also be caused by underlying health conditions or developmental changes, so if issues persist, it's recommended to consult a healthcare professional.
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They are light sleepers due to their environment
A baby's sleep can be affected by various environmental factors. Firstly, it is important to establish a safe sleep environment. The American Academy of Pediatrics recommends that babies sleep in the same room as their parents for at least the first six months, which can reduce the risk of SIDS and other sleep-related issues. However, babies should sleep on their own sleep surface, such as a crib or bassinet, placed in the middle of a longer wall, away from windows, decorations, and other hazards. The crib should only contain a firm, flat, and level mattress with a fitted sheet, as soft surfaces and additional items can increase the risk of suffocation and positional asphyxia.
Once your baby is at least six months old, you can consider moving them to their own room to reduce disruptions from noise and light. To create a conducive sleep environment, use room-darkening blinds or curtains to block out light, and turn down the thermostat to ensure a comfortable temperature. Minimize external noise by closing the door and using a fan or white noise machine to create a neutral sound that can mask other noises.
Additionally, establishing a consistent bedtime routine can help your baby develop independent sleep skills and self-soothe. This includes avoiding props such as rocking, feeding, or using pacifiers exclusively to put your baby to sleep. Instead, focus on creating a calm and relaxing atmosphere without stimulating elements like music or flashing lights.
By addressing these environmental factors and creating a safe, comfortable, and consistent sleep environment, you may be able to improve your 9-month-old's sleep quality and duration.
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They may grow out of light sleeping
It is important to remember that all babies are light sleepers, and all babies are heavy sleepers, just like all adults. A baby's sleep cycle is simplified as moving from light sleep to heavy sleep, and back again several times a night. Some babies spend more time in the light sleep stage before slipping into a deeper sleep. Overall, babies spend twice as much time in light sleep stages than adults.
Babies have shorter sleep cycles than adults. They are moving in and out of light sleep more often. If your baby is a light sleeper, it can mean that they tend to spend more time in light sleep. Light sleep is REM sleep, when we dream and are more aware of our surroundings.
As your baby grows older, they may grow out of light sleeping. You can teach them the skills to become "good sleepers". Firstly, you can teach them to fall back to sleep on their own when they do wake up. Children who self-soothe can go down into a deeper sleep state more quickly. Set up a consistent routine and experience for falling asleep, so they know what to expect. If they do cry or call out, it is okay to check in or give verbal reassurance.
You can also try to reduce the chances of your baby being awoken by noise from others in the house. Putting them in their own room may help, as well as turning down the thermostat at night, closing the door, and investing in some room-darkening blinds or curtains. A fan or a radio set between stations can create a neutral sound in the room that will mask other noises.
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Frequently asked questions
All babies are light sleepers and heavy sleepers. Your baby may be spending more time in light sleep than deep sleep, which is the easiest stage to wake up from. Babies have shorter sleep cycles than adults and move in and out of light sleep more often.
You can't get your baby to sleep more deeply, but you can teach them to fall back to sleep on their own. Set up a consistent routine and experience for falling asleep, so they know what to expect.
If you're rocking your baby to sleep, feeding them to sleep, or giving them a pacifier every time they sleep, they will become dependent on these "props". Teach them to sleep independently by removing these dependencies.
The Public Health Association of Canada recommends room-sharing until your baby is at least 6 months old. After this, transitioning them to their own room may reduce the chance of them being awoken by noise from others in the house.











































