
It is common for babies to fall asleep in the car, and while a few minutes of on-the-go sleep is okay, caregivers should not let children sleep in the car for long stretches or use car seats as a dedicated sleep space. Sleeping in a sitting or semi-upright position can cause a baby to slump down and end up in a chin-to-chest position, potentially causing suffocation. This phenomenon, known as positional asphyxiation, was found to be the cause of 48% of deaths in car seats in a 2015 study.
| Characteristics | Values |
|---|---|
| Safe sleep position for newborns | Firm, flat surface, such as a crib or bassinet |
| Safe to sleep in a car seat | Yes, for short stretches and if used properly |
| Safe to sleep in a car seat when not in a car | No, the baby's position can change and restrict airways |
| Safe to sleep in a stroller | No, babies spend too much time in the sitting position |
| Safe to sleep in a car seat overnight | No, this is very dangerous and can cause death |
| Safe to sleep in a car seat if supervised | Yes, but only for short journeys |
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What You'll Learn
- It is okay for newborns to sleep in car seats for short periods of time, but not for extended or overnight sleep
- The risk of respiratory issues increases when a car seat is removed from the car or stroller base and used differently from its original design
- It is recommended to use a firm, flat surface such as a crib or bassinet for baby sleep, as per the American Academy of Pediatrics (AAP)
- Inclined sleep positions are unsafe and can cause positional asphyxiation, which is the leading cause of infant deaths in sitting devices
- Car seats are designed to protect babies in collisions and prevent slumping, but they are not appropriate for unsupervised or extended sleep

It is okay for newborns to sleep in car seats for short periods of time, but not for extended or overnight sleep
It is generally advised that newborns should not sleep in car seats for extended periods or overnight. However, it is considered safe for newborns to sleep in car seats for short periods, such as during car rides or when transitioning from a car to a stroller.
The main concern with newborns sleeping in car seats is the risk of positional asphyxiation or restricted airways. When a baby sleeps in a sitting position, their head can fall forward, blocking their airways and causing them to stop breathing. This is especially true for newborns who do not yet have the neck strength to hold their heads up. Additionally, car seats are designed to be used while the baby is being observed and should not be used as a substitute for a safe sleep space.
To ensure the safety of newborns sleeping in car seats, it is crucial to follow the manufacturer's instructions for proper installation and use. Car seats should be installed at the correct angle, usually between 30 and 45 degrees for rear-facing seats, and the harness should be securely fastened. It is also important to never leave a baby unattended in a car seat, especially when it is placed on a surface other than the car seat base, as the baby's position can change, increasing the risk of suffocation.
While short periods of sleep in a car seat are generally considered safe, it is still recommended to move the baby to a firm, flat surface, such as a crib or bassinet, as soon as possible. This ensures that the baby can sleep in a safe and comfortable position, reducing the risk of positional asphyxiation. Therefore, while it may be convenient to let a newborn sleep in a car seat for short periods, it should not be a regular practice, and priority should be given to creating a safe sleep environment for the baby.
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The risk of respiratory issues increases when a car seat is removed from the car or stroller base and used differently from its original design
While it is safe for a baby to take a quick nap while travelling in a car, it is not advisable to let them sleep in a car seat for extended periods or use it as a replacement for a crib or bassinet. Car seats are designed to be used only when the baby is being observed and not for extended or overnight sleep.
When a car seat is removed from the car or stroller base, the risk of respiratory issues and other problems increases. This is because the baby's position can change, and the angle at which the car seat is tested is very specific. An unbalanced seat can cause the baby's head to fall forward, obstructing their airway and leading to positional asphyxiation.
Additionally, when a car seat is placed on a high or soft surface, there is a risk of the seat toppling over or the baby slumping down, blocking their airway. Even infants strapped into the harness can move slightly and tip the balance of the car seat. Therefore, it is recommended to always place the baby in a safe sleep environment, such as a firm, flat crib or bassinet, once you reach your destination.
It is also important to note that car seats are designed to protect babies in the event of a collision and to ensure that if they fall asleep, the risk of slumping down and blocking their airflow is low. However, this is only true when the baby is properly secured in the car seat with the five-point harness system.
To ensure the safety of your newborn, it is crucial to follow the manufacturer's instructions for installing and using the car seat correctly and to avoid any unsafe sleep practices that could put your baby at risk.
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It is recommended to use a firm, flat surface such as a crib or bassinet for baby sleep, as per the American Academy of Pediatrics (AAP)
It is not recommended to let your baby sleep in a car seat for long stretches or use it as a dedicated sleep device. While it is safe for your baby to take a quick nap while you are driving from point A to B, it is not safe for them to sleep in a sitting position for extended periods. This is because their heads can fall forward, restricting their airways and causing them to stop breathing, a phenomenon known as positional asphyxiation. In fact, a 2015 study published in The Journal of Pediatrics found that 48% of deaths in car seats were caused by positional asphyxiation, and 52% were caused by strangling on straps.
The American Academy of Pediatrics (AAP) recommends that babies sleep safely in a flat, empty sleep space like a crib or play yard. As such, it is best to move your baby to a firm, flat surface such as a crib or bassinet as soon as possible. This will keep your child safe and reduce the risk of positional asphyxiation.
It is important to note that car seats are designed to be used only while you are with your baby and observing them, not for extended or overnight sleep. Additionally, car seats should not be placed on high surfaces like countertops or soft surfaces like beds or couches, as they can easily tip over and block your baby's airway.
If you are planning a long car ride, it is recommended to pull over every two hours to let your baby stretch their legs and get some fresh air. It is also a good idea to have another adult with you so that one person can supervise the baby while the other focuses on the road.
In summary, while it is safe for your baby to take a quick nap in the car, it is important to move them to a firm, flat surface like a crib or bassinet as soon as possible. The AAP recommends that babies sleep in a flat, empty sleep space to reduce the risk of positional asphyxiation and other dangers.
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Inclined sleep positions are unsafe and can cause positional asphyxiation, which is the leading cause of infant deaths in sitting devices
While it is tempting to let your baby sleep in a car seat, especially when they fall asleep during a car ride, it is important to understand the risks associated with letting them do so for extended periods.
The risk of positional asphyxiation is higher when the car seat is removed from the car and placed on another surface, as the baby's position can change, and they may slump down into a chin-to-chest position, potentially blocking their airway. This risk is also present when using other sitting devices such as strollers, shopping carts, chairs, swings, and bouncers.
To reduce the risk of positional asphyxiation, it is important to never use a car seat as a substitute for a safe sleep space. The safest place for your baby to sleep is on a firm, flat surface, such as a crib, bassinet, or play yard. Additionally, when your baby is sleeping in a car seat, make sure they are always supervised and that the car seat is used correctly.
It is also important to note that car seats are designed to be used while your baby is being observed and should not be used for extended or overnight sleep. If your baby falls asleep in the car seat while you are driving, it is generally considered safe to let them continue sleeping for a short period, as long as they are properly secured and supervised. However, it is recommended to move them to a safe sleep space as soon as possible.
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Car seats are designed to protect babies in collisions and prevent slumping, but they are not appropriate for unsupervised or extended sleep
Car seats are designed to protect babies in the event of a collision. They also help to prevent slumping, which can obstruct a baby's airway and cause suffocation. However, car seats are not designed for extended or unsupervised sleep.
While it is generally safe for a baby to nap in a car seat while travelling from point A to B, it is not safe for them to sleep in a car seat for long stretches or use it as a dedicated sleep device. The American Academy of Pediatrics (AAP) recommends that babies sleep on their backs on a firm, flat surface, such as a crib or bassinet, without any blankets, pillows, stuffed animals, or bumpers.
The issue with letting a baby sleep in a car seat for extended periods is that their head can fall forward, restricting their airways and causing them to stop breathing. This is known as positional asphyxiation and was found to be the cause of 48% of deaths in car seats in a 2015 study. Additionally, if the harness straps are loose or partially buckled, babies can strangle in them.
It is important to note that car seats are tested at a specific angle, and when removed from the car or stroller base, the baby's position can change, increasing the risk of respiratory issues and other problems. Therefore, it is recommended that babies are only placed in car seats when necessary and that they are always supervised while in the seat.
If a baby falls asleep in a car seat while travelling, it is advisable to move them to a crib or bassinet as soon as possible. It is also recommended to take breaks during long car rides to check on the baby and get them out of the car seat.
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Frequently asked questions
It is generally not recommended for newborns to sleep in a car seat for extended periods of time or overnight. However, it is okay for newborns to sleep in a car seat for short stretches while travelling.
Sleeping in a sitting or semi-upright position can cause a newborn to slump down into a chin-to-chest position, potentially blocking their airway and causing suffocation, also known as positional asphyxiation.
If your newborn falls asleep while in their correctly installed car seat, it is safe to let them continue sleeping for short trips. However, once you reach your destination, transfer them to a firm, flat sleep surface like a crib or bassinet as soon as possible.
If you are running errands and think your newborn might get sleepy, consider using a baby carrier instead. This allows your newborn to sleep upright against you while you remain hands-free.
Here are some tips to ensure your newborn sleeps safely in a car seat:
- Ensure the car seat is correctly installed at the recommended angle, following the manufacturer's instructions.
- Always supervise your newborn while they are sleeping in the car seat.
- Avoid placing the car seat on elevated surfaces like countertops or soft surfaces like beds or couches.
- Do not loosen the harness straps or unfasten any buckles, as this can increase the risk of slumping or entanglement.











































