Skip to content

Understanding and Managing the 4-Month Sleep Regression

When your previously great sleeper suddenly starts waking up multiple times during the night, you might be dealing with a common phase known as the 4-month sleep regression. This article explores what this phase entails, why it happens, and how to handle it.

What is the 4-Month Sleep Regression?

The 4-month sleep regression is a period when your baby’s sleep patterns shift, often causing them to wake up more frequently at night and have shorter naps. This can be a challenging time for parents, but understanding what is happening can help you navigate this period more effectively.

Why Does the 4-Month Sleep Regression Happen?

The 4-month sleep regression typically occurs due to developmental changes in your baby’s sleep cycle. At around four months, your baby’s sleep pattern starts to become more like an adult’s, cycling between light and deep sleep. This transition can result in more frequent wake-ups.

How to Manage the 4-Month Sleep Regression

Establish a Routine

Setting a consistent sleep routine can help your baby adjust to their new sleep patterns. This routine might include a warm bath, a feeding, and a bedtime story or lullaby.

Be Responsive

During this period, your baby needs to know that you’re there for them. Responding promptly to their needs can help provide comfort and facilitate better sleep.

Create a Sleep-Friendly Environment

Ensure your baby’s sleep environment is conducive to good sleep. This can include a quiet, dark room, using a white noise machine, and ensuring the room temperature is comfortable.

Offer Comforting Items

Comforting items such as a favorite blanket or soft toy can help soothe your baby, making it easier for them to settle back to sleep.

Common Questions About the 4-Month Sleep Regression

Do All Babies Go Through the 4-Month Sleep Regression?

Not all babies experience a noticeable 4-month sleep regression. However, most infants do undergo changes in their sleep patterns around this age, which can result in increased wakefulness at night or shortened nap times.

What Triggers a Sleep Regression?

Sleep regressions are usually triggered by developmental milestones. At four months old, babies start to develop more mature sleep cycles, which can disrupt their previous sleeping patterns.

What Are the Signs of Sleep Regression?

Signs of sleep regression include increased night waking, shortened naps, difficulty falling asleep, and increased fussiness around sleep times.

Managing the 4-Month Sleep Regression

How Can I Address My Baby’s 4-Month Sleep Regression?

To manage a 4-month sleep regression, it’s important to maintain a consistent bedtime routine, provide a conducive sleep environment, and offer plenty of comfort and reassurance. Responding promptly to your baby’s needs can also provide them with a sense of security.

How Can I Teach My 4-Month-Old to Self-Soothe?

Helping your baby learn to self-soothe can be a gradual process. Start by establishing a soothing bedtime routine and putting your baby down to sleep when they’re drowsy but still awake. This helps them associate the bed with falling asleep and can encourage self-soothing abilities over time.

Should I Feed My Baby During Sleep Regression?

While it’s important to respond to your baby’s hunger cues, frequent night feedings might not always be necessary during a sleep regression. Try soothing your baby back to sleep in other ways first, and consult with your pediatrician if you’re unsure about your baby’s feeding needs.

Can I Use the Cry-It-Out Method During the 4-Month Sleep Regression?

Whether to use the cry-it-out method during a sleep regression is a personal decision. Some parents find that it can help their baby learn to self-soothe, while others prefer a more responsive approach. Always choose a method that feels comfortable for you and your baby.

Understanding the Duration of the 4-Month Sleep Regression

What Week Is Most Common for the 4-Month Sleep Regression?

The 4-month sleep regression typically begins between 3.5 and 5 months of age. It’s important to note that each baby is unique and may experience this regression at slightly different times.

Will the 4-Month Sleep Regression End on Its Own?

Yes, the 4-month sleep regression is a phase that will eventually pass. As your baby adapts to their new sleep patterns, their sleep habits should gradually return to normal.

What Not to Do During a Sleep Regression

During a sleep regression, try to avoid establishing new habits that might be hard to break later, like rocking or feeding your baby to sleep. Instead, aim to promote self-soothing skills and maintain a consistent sleep routine.

How Can Help

At, we understand that dealing with the 4-month sleep regression can be challenging. Our goal is to provide you with the necessary tools and advice to navigate this and other sleep-related challenges.

We offer a range of resources, including articles, expert advice, and community support, all geared towards helping you and your baby achieve better sleep. Whether you’re dealing with the 4-month sleep regression or other sleep issues, is here to support you every step of the way.


The 4-month sleep regression can be a tough time for both you and your baby. Remember, it’s a phase that will pass, and your baby is learning essential skills for their development. Stay patient, responsive, and consistent, and before long, your baby will be back to sleeping soundly.