
A 4-month-old baby typically sleeps 12-16 hours a day, including nighttime sleep and 3-4 naps. However, every baby is unique, and there is no specific age when babies start sleeping through the night. The 4-month sleep regression can cause nap troubles, and it's common for babies to transition from four to three naps. It is recommended that babies are placed on their backs to sleep and share a room with their parents without bed-sharing to reduce the risk of SIDS. Dressing the baby appropriately for the room temperature is important to avoid overheating, and loose items such as hats and blankets should be avoided.
| Characteristics | Values |
|---|---|
| Number of naps | 3-5 naps per day |
| Duration of naps | 30 minutes to 2 hours |
| Total daytime sleep | 3-4.5 hours |
| Nighttime sleep | 6-12 hours |
| Total sleep | 12-17 hours |
| Sleepwear | Dress for room temperature, avoid overheating |
| Sleep surface | Crib or bassinet in parents' room |
| Sleep position | On back |
| Accessories | No loose items, e.g. hats, blankets |
| Room temperature | 68°-72°F |
| Fans | Recommended |
| Pacifiers | Offer but don't force |
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Sleep training methods
When it comes to what a 4-month-old baby should sleep in, safety is the top priority. The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing until the baby's first birthday or for at least the first 6 months, as this can reduce the risk of sudden infant death syndrome (SIDS) by up to 50%. Keeping the baby's crib, portable crib, play yard, or bassinet in the same room as the parents allows for easier feeding, comforting, and monitoring during the night.
It is recommended to always place the baby on their back to sleep, as this has significantly contributed to the decrease in SIDS rates since the AAP first made this recommendation in 1992. If the baby can roll both ways on their own, they don't need to be returned to their back if they shift onto their tummy or side while sleeping. The sleep surface should be firm and flat, covered with a fitted sheet, and free from any loose items, plush toys, pillows, blankets, comforters, bumper pads, and similar objects.
The ideal room temperature for a baby's sleep environment is between 68° and 72°F (20° and 22°C). It is important to dress the baby appropriately for the room temperature, avoiding overdressing or overbundling, as overheating has been linked to an increased risk of SIDS. A fan can help keep the room cool and circulate air, further reducing the risk of SIDS.
Now, let's discuss sleep training methods for a 4-month-old baby:
Sleep training is a process of teaching your baby to self-soothe and fall asleep independently without assistance from a parent or caregiver. It is generally recommended to start sleep training a newborn after the 4th trimester, between 4 to 6 months of age. However, it's important to note that not all babies develop at the same pace, and some may need more time to establish healthy sleep patterns.
There are various sleep training methods available, ranging from gradual, gentle techniques to more intensive approaches:
- Gradual Withdrawal or Fading: This method involves gradually reducing the amount of assistance or presence the parent provides during bedtime. For example, you might start by sitting next to the crib until the baby falls asleep, then gradually move towards the door, and eventually, leave the room before they fall asleep.
- Pick-up-Put-down: This technique involves picking up and soothing the baby briefly when they cry, then putting them back down in their crib while they are still awake but calm. This helps them learn to self-soothe and fall back asleep independently.
- Total Extinction or Cry-It-Out: This approach involves allowing the baby to cry themselves to sleep without providing any comfort or reassurance. While some parents find this method successful, others may find it challenging due to the potential for increased crying.
It's important to remember that sleep training may not be a quick fix, and progress may vary from night to night. Consistency is key, but it's also important to remain flexible and adjust your approach as needed. Some nights, your baby may struggle more than others, and it's okay to take a break and try again the next night or opt for a gentler method.
Before starting sleep training, ensure that your baby is well-fed, dry, and not experiencing any physical discomfort. Additionally, consider joining support groups or consulting a physician to better understand what to expect during this transitional period.
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Sleep environment
A 4-month-old baby's sleep environment should be carefully considered to ensure safety and comfort. Here are some guidelines for creating a safe and conducive sleep environment:
Room-Sharing: The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing for the first 6 to 12 months of a baby's life. This means placing your baby's crib, bassinet, or play yard in your bedroom instead of in a separate nursery. Room-sharing can reduce the risk of Sudden Infant Death Syndrome (SIDS) by up to 50%. It also facilitates easier feeding, comforting, and monitoring during the night.
Sleep Position: Always place your baby on their back to sleep. This recommendation from the AAP has significantly reduced the rate of SIDS since 1992. Once your baby can roll over both ways (back to front and front to back), you don't need to return them to their back if they roll during sleep.
Sleep Surface: Use a firm, flat sleep surface for your baby. Cover the mattress with a snug-fitting sheet, and avoid using any other items in the crib or bassinet, such as pillows, blankets, quilts, comforters, or bumper pads. These items can pose a safety hazard and increase the risk of SIDS.
Temperature and Dress: Maintain a comfortable temperature in the baby's room, ideally between 68° and 72°F (20° to 22°C). Dress your baby appropriately for the room temperature to avoid overheating, as this is also a risk factor for SIDS. It is better to have your baby slightly underdressed than heavily overdressed. You can use a fan in the room to keep the air circulating and help regulate temperature.
Avoid Hazards: Keep loose items and accessories away from the baby's sleep area. Avoid anything with cords, ties, or ribbons that could pose a strangulation hazard. Ensure that hanging items, such as mobiles or window blind cords, are out of the baby's reach. Do not let your baby sleep in a sitting device, feeding pillow, or any product that is not specifically designed for sleeping infants.
Pacifier: Offering a pacifier at sleep time can help soothe your baby and promote sleep. However, don't force it, and there is no need to replace it if it falls out during sleep.
It's important to note that every baby is unique, and you should adjust the sleep environment based on your baby's specific needs and preferences. Consult with your paediatrician or healthcare provider for personalised advice and guidance.
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Sleepwear
When it comes to sleepwear for your four-month-old, there are a few key considerations to keep in mind. Firstly, it is important to dress your baby according to the room temperature to ensure they are comfortable. The ideal room temperature should be between 68° and 72°F. You can adjust their sleepwear by adding or removing a layer depending on whether your house is typically cooler or warmer. Remember, it is better to have your baby slightly underdressed than heavily overdressed, as overheating has been linked to an increased risk of Sudden Infant Death Syndrome (SIDS).
Secondly, avoid any loose articles of clothing or accessories that could pose a safety hazard. For example, hats should be avoided as they can slip over your baby's face, inhibiting their breathing, and they can also lead to overheating, as babies regulate their body temperature through their head. Instead, focus on dressing your baby in comfortable, snug-fitting sleepwear made from breathable fabrics such as cotton or natural fibres.
Additionally, it is recommended to place your baby on their back to sleep, following guidelines from the American Academy of Pediatrics (AAP). This has significantly reduced the rate of SIDS since the recommendation was made in 1992. However, if your baby can roll both ways on their own, you don't need to return them to their back if they move to their tummy or side while sleeping.
It's also important to note that room-sharing without bed-sharing is recommended by the AAP for the first 6 to 12 months to further reduce the risk of SIDS. This means having your baby sleep in their own crib or bassinet in your room. Using a fan in the room can also help keep your baby cool and reduce the risk of SIDS.
Lastly, be mindful of your baby's sleep patterns and adjust their sleepwear accordingly. At four months, babies typically take three to four naps a day, lasting between 30 minutes to two hours each. Some babies may also experience the 4-month sleep regression, which can cause nap troubles and increased night wakings. Adjusting their sleepwear to ensure they are comfortable can help promote better sleep during this transitional period.
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Sleep regression
Around 4 months old, a big change occurs in a baby's sleep patterns due to the maturation of their internal clock (aka circadian rhythm). This is often referred to as the "4-month sleep regression". It's important to note that this regression is not a sign of temporary setbacks but rather a sign of maturation and growth.
During this time, babies may start taking shorter naps, having trouble falling asleep during the day, or showing signs of overtiredness due to more fragmented sleep. They may also experience frequent night wakings, which can lead to increased fussiness and changes in appetite or mood during the day. This regression is caused by a biological shift in the way babies sleep, transitioning from newborn patterns to more mature sleep stages. It's common for 4-month-olds to wake up more frequently at night as they begin having additional cycles of light and deep sleep, similar to adults.
To help your baby through this regression, you can encourage independent sleep habits by putting them in their sleep space when they're drowsy but still awake. This helps them learn how to self-soothe, which can lead to fewer night wakings and more restful nights for the whole family. It's also important to maintain a consistent sleep routine, offer soothing reassurance, and be patient as your baby adjusts to these new sleep patterns.
While there is no definitive end to the 4-month sleep regression, most babies tend to start sleeping better when they follow an age-appropriate sleep schedule, are developmentally able to link sleep cycles, and learn how to fall asleep independently. With the right guidance, most babies can master falling asleep on their own by 5-6 months old, if not sooner.
In terms of creating a safe sleep environment for your 4-month-old, the American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing for the first 6 to 12 months. This means placing your baby's crib, portable crib, play yard, or bassinet in your bedroom instead of a separate nursery. This practice can reduce the risk of Sudden Infant Death Syndrome (SIDS) by up to 50%. Additionally, always place your baby on their back to sleep and use a firm, flat sleep surface with a snug-fitting sheet. Keep the room temperature between 68° and 72°F, and avoid overdressing your baby to prevent overheating.
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Sleep safety
Around the four-month mark, babies start to develop a more mature sleep pattern. This means they will begin to have additional cycles of light and deep sleep, similar to adults. This maturation is a sign of growth and development. However, this change can cause sleep regression, which may result in more frequent night-time awakenings, shorter naps, difficulty falling asleep, and increased fussiness.
- Always place your baby on their back to sleep, not on their stomach or side. If your baby can roll both ways on their own, you don't need to return them to their back if they move to their tummy or side while sleeping.
- Use a firm, flat sleep surface.
- Cover the mattress with a sheet that fits snugly.
- Do not put anything else in the crib or bassinet. Keep plush toys, pillows, blankets, quilts, comforters, sheepskins, and bumper pads out of your baby's sleep area.
- To avoid overheating, dress your baby according to the room temperature and don't overdress them. The ideal room temperature should be between 68° and 72°F. Overheating has been linked to a greater risk of Sudden Infant Death Syndrome (SIDS).
- Keep your baby away from smokers. Secondhand smoke increases the risk of SIDS.
- Offer a pacifier to your baby at sleep time, but don't force it.
- Avoid hazards such as items with cords, ties, or ribbons that can wrap around a baby's neck, and objects with sharp edges or corners.
- Do not let your baby fall asleep on a product that is not specifically designed for sleeping babies, such as a car seat, feeding pillow, or infant lounger.
- Do not use products or devices that claim to lower the risk of SIDS, such as sleep positioners or monitors that detect a baby's heart rate and breathing pattern.
- Make sure that all sleep surfaces and products you use to help your baby sleep have been approved by the U.S. Consumer Product Safety Commission (CPSC) and meet federal safety standards.
- Establish a bedtime routine.
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Frequently asked questions
The ideal room temperature for a baby to sleep in is between 68° and 72°F. It is important to dress the baby according to the room temperature to avoid overheating, which has been linked to a greater risk of Sudden Infant Death Syndrome (SIDS).
A 4-month-old baby should sleep for a total of 12-17 hours a day, including nighttime sleep and 2-4 naps. However, it is normal for babies at this age to still need one feeding at night.
According to the AAP safe sleep guidelines, babies at 4 months should be placed on their backs for sleep. If the baby can roll both ways on their own, they don't need to be returned to their back if they move to their tummy or side while sleeping.










































