
Establishing a bedtime routine for your 4-month-old baby can be challenging, especially when you're sleep-deprived. While room-sharing is considered safe, it is not recommended to put your baby to sleep in the same bed as you. Bed-sharing increases the risk of SIDS (Sudden Infant Death Syndrome) and other sleep-related deaths. Instead, it is recommended that babies sleep in their own room, in a crib or bassinet, without pillows, blankets, or stuffed animals, which can be hazardous. At 4 months old, babies should be getting between 12 and 16 hours of sleep per day, including a longer stretch at night and at least two naps during the day.
| Characteristics | Values |
|---|---|
| Typical bedtime | Between 6:30 p.m. and 8:00 p.m. |
| Sleep duration | 12 to 16 hours per day |
| Daytime sleep | 3 to 4 hours, including 3 to 5 naps |
| Nighttime sleep | 10 to 12 hours, with 1 to 3 wakings |
| Sleep position | On their back |
| Sleep surface | Crib or bassinet |
| Sleep routine | Soothing activities like a warm bath, stories, or singing |
| Sleep training | Recommended to wait until 5 to 6 months |
| Sleep regression | Temporary disruption at 4 months due to developmental changes |
| Safe sleep environment | Remove hanging items and soft toys; avoid sitting devices, feeding pillows, and weighted blankets |
| SIDS risk reduction | Room-sharing without bed-sharing recommended by AAP |
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What You'll Learn

The 4-month sleep regression
During this time, a baby's brain and body are developing rapidly, and the process of forming and linking different areas of the brain and nervous system may create instability in sleep. As babies' sleep patterns mature, they begin to cycle through light and deep sleep more like adults, and they may fully wake up between sleep cycles and need help falling back to sleep. This can lead to more night wakings and shorter naps, as they may call out for their caregiver to help them get back to sleep.
To cope with the 4-month sleep regression, caregivers can help maintain a consistent sleep routine, offer soothing reassurance, and encourage independent sleep habits. It is important to be patient as the baby adjusts to these new changes. Additionally, it is recommended to wait until the baby is 5 months old to begin formal sleep training, as melatonin is still regulating and sleep cycles are still shifting during the 4-month sleep regression.
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Safe co-sleeping practices
While co-sleeping is not recommended, if you do choose to co-sleep with your 4-month-old, there are several safety precautions you should take to reduce the risk of sudden infant death syndrome (SIDS) and other sleep-related accidents. Here are some safe co-sleeping practices to consider:
Create a safe sleep environment: Remove any soft items, loose bedding, or hanging objects that could pose a risk of suffocation or strangulation. This includes pillows, blankets, toys, and window blind cords. Ensure your baby sleeps on a firm surface approved by the U.S. Consumer Product Safety Commission (CPSC) and meets federal safety standards.
Room-sharing without bed-sharing: The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing until your baby's first birthday or for at least the first six months. This means keeping your baby's sleep space close to yours but not in the same bed. This can help reduce the risk of SIDS while still allowing for easy access for feeding and comforting.
Back sleeping is best: Always place your baby on their back to sleep, whether they are sleeping in their own space or co-sleeping with you. Sleeping on the back helps protect your baby's airways and reduces the risk of SIDS. If your baby can roll over independently, most pediatricians say tummy sleeping is safe.
Avoid co-sleeping if impaired: Do not co-sleep if you are under the influence of drugs or alcohol, as this can impair your awareness and responsiveness. Similarly, if you or your partner have taken any medications that make you feel sleepy, move your baby to a separate safe sleep space.
Breastfeeding and co-sleeping: Research suggests that bed-sharing with a healthy, full-term baby by a responsible, non-smoking, breastfeeding mother on a safe surface is as safe as any other sleep arrangement. The responsiveness of a breastfeeding mother helps protect against rolling over onto the baby.
Maintain a consistent sleep routine: By 4 months, your baby should be developing a regular sleep pattern. Stick to a consistent bedtime routine, including soothing activities like a warm bath and stories or singing. A typical bedtime for a 4-month-old is between 6:30 p.m. and 8:00 p.m. to prevent over-tiredness and support longer nighttime sleep.
Remember, every family and baby is unique, so make informed decisions that feel right for your situation. If you have any concerns or questions about your baby's sleep, don't hesitate to consult your paediatrician or healthcare provider.
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Soothing bedtime activities
By the time your baby is four months old, they should be well on their way toward having a regular sleep pattern. However, this is also the time when they start experiencing sleep regression, which can bring unexpected disruptions like frequent night wakings or shorter naps. This is a critical period for your baby's brain and body development, and the process of forming and linking different areas of the brain and nervous system may create instability in sleep.
- A warm bath followed by stories or singing signals the end of the day. These activities can be used at bedtime for years to come.
- A gentle massage with lotion can relax your baby.
- Read a short book or sing a soft lullaby.
- Ensure your baby is well-fed before bed.
- Place your baby in the crib while they're drowsy but still awake. If your baby cries, stay away for a few minutes. They may settle down and go to sleep. If the crying continues, soothe your baby without picking them up.
- A typical bedtime for a 4-month-old is between 6:30 p.m. and 8:00 p.m. Earlier bedtimes can help prevent over-tiredness and support longer nighttime sleep.
- Babies this age should sleep 12-16 hours a day, including three to four daytime naps and around 10 to 12 hours of nighttime sleep.
- Make sure to review guidance for safe sleep and reducing the risk of sudden infant death syndrome (SIDS). Some risk reduction techniques for SIDS include removing soft items from the baby’s sleep space and always putting the infant to bed on their back.
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Daytime napping schedules
At 4 months old, it is common for naps to still be inconsistent, ranging from 20 to 120 minutes. While it's important to be responsive to your baby's individual needs and cues, there are some general guidelines that can help establish a flexible routine. Aim for around 3 to 5 naps per day, ensuring that no single nap exceeds 2 hours. This helps maintain a balance between daytime napping and adequate nighttime sleep.
As your baby approaches 5 months old, the goal is to transition towards 3 solid naps per day by gradually expanding their wake windows. The length of these wake windows can vary throughout the day, typically ranging from 90 to 120 minutes. For example, a 4-month-old baby might have a shorter wake window in the morning, lasting around 90 minutes, and a longer one in the afternoon, up to 120 minutes.
It's important to remember that every baby is unique, and their sleep patterns will depend on various factors such as when they wake up, how long they nap, and their individual cues. While daytime napping schedules are important, prioritizing night sleep is typically recommended. Establishing consistent nighttime sleep patterns will often lead to improved daytime napping as well.
As your baby grows into a toddler, their sleep needs will continue to evolve. Most toddlers will stop napping between 3 and 4 years old, with 94% stopping by age 5. If you notice that daytime napping is negatively impacting your toddler's nighttime sleep, it may be time to consider transitioning to quiet time instead of naps.
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Reducing the risk of SIDS
SIDS, or Sudden Infant Death Syndrome, is the leading cause of death among infants between the ages of 1 month and 1 year. The exact cause of SIDS is unknown, but there are several risk factors that parents and caregivers should be aware of to ensure their baby's safety. Here are some ways to reduce the risk of SIDS:
Room-sharing without bed-sharing
The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing until your baby's first birthday or for at least the first six months when the risk of SIDS is highest. Sharing your bedroom with your baby can reduce their risk of SIDS by up to 50%. You can use a sidecar attached to the bed or a bassinet to facilitate breastfeeding, or a portable or permanent crib if you're not breastfeeding.
Safe sleep environment
Ensure your baby's sleep environment is safe and free of hazards. Remove soft items, loose bedding, and bumper pads from the crib or bassinet. Keep hanging mobiles, wall hangings, pictures, draperies, and window blind cords out of your baby's reach. Use a firm, flat mattress and cover it with a fitted sheet only. Make sure your baby's head cannot get trapped between the bars of the crib.
Back sleeping
Always place your baby on their back to sleep. Sleeping on the stomach or side increases the risk of SIDS. The AAP's "Back to Sleep" campaign recommends back sleeping for all healthy infants younger than 1 year old.
Avoid sleep positioners and wedges
Do not use sleep positioners, wedges, or other devices that claim to reduce the risk of SIDS. These products have not been proven effective and may even be harmful.
Vaccinations
Keep your baby up to date with their vaccinations. Research has shown that staying on schedule with vaccinations can reduce the risk of SIDS by half.
Breastfeeding
Breastfeeding has been shown to reduce the risk of SIDS. Exclusive breastfeeding or feeding with expressed milk is most protective, but any breastfeeding is beneficial.
It's important to remember that while these measures can help reduce the risk of SIDS, they may not eliminate it completely. Always follow the guidance of your healthcare provider and reach out with any questions or concerns.
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Frequently asked questions
The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing until your baby's first birthday or for at least 6 months, as this is when the risk of Sudden Infant Death Syndrome (SIDS) is highest. To reduce the risk of SIDS, the AAP recommends removing soft items from the baby’s sleep space and always putting the infant to sleep on their back.
From the age of 4 to 12 months, infants typically need 12 to 16 hours of sleep per day, including three to four daytime naps and around 10 to 12 hours of nighttime sleep. It is normal for a 4-month-old to wake up one to three times per night for feeding or comfort.
A bedtime routine that includes soothing activities can help relax your baby and signal bedtime. This can include a warm bath, followed by stories or singing. It is recommended to put your baby to bed while they are drowsy but still awake, as this will help them learn to fall asleep independently.















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