As your baby grows, so do their sleep needs—and one of the most common questions parents ask is, “When should I move my baby from a bassinet to a crib?” Transitioning before three months is ideal for supporting your baby’s physical development, improving their sleep quality, and preventing conditions like flathead syndrome (plagiocephaly) and torticollis.
In this blog, I’ll explain why making the switch before three months is beneficial, how it impacts your baby’s development and sleep, and why it can even help during the four-month sleep regression. I’ll also answer frequently asked questions about this transition and share tips for a smoother process.

Why Move Your Baby to a Crib Before Three Months?
1. Supports Rolling and Developmental Milestones
By three months, babies often start practicing rolling—a huge developmental milestone. Rolling builds strength, coordination, and mobility, but to practice, babies need enough space to move freely.
While bassinets are perfect for newborns, they quickly become too small. Moving to a crib before three months gives your baby the room they need to stretch, roll, and develop critical motor skills.
2. Prevents Flathead Syndrome and Torticollis
Flathead syndrome (plagiocephaly) happens when babies rest in the same position for too long, leading to an uneven head shape. Torticollis, which tightens neck muscles and tilts the baby’s head to one side, can also result from restricted movement in smaller sleep spaces.
A crib offers more space for your baby to move their head naturally, helping to prevent these conditions. Starting the transition before three months reduces the risk further.
3. Enhances Sleep Quality Through Movement
Babies naturally move in their sleep—it’s how they find comfortable positions and self-soothe during nighttime wake-ups. Bassinets, however, limit movement and make it harder for babies to resettle on their own.
A crib’s larger sleeping surface allows your baby to roll, wiggle, and find their favorite positions, leading to better, longer, and more restful sleep.
Signs It’s Time to Transition to a Crib
Here are some signs that your baby may be ready to move from bassinet to crib:
They seem cramped in the bassinet: If your baby’s arms or legs are touching the sides, it’s time for a larger space.
They’re starting to roll: Even early rolling attempts need room to practice.
Frequent night wakings: If your baby is restless, the added space of a crib may help.
Flat spots on their head: Transitioning to a crib can reduce further flattening by encouraging natural movement.

How a Crib Helps During the Four-Month Sleep Regression
The four-month sleep regression is a developmental milestone when your baby’s sleep cycles mature, often leading to frequent wake-ups. While this phase can be challenging, transitioning to a crib before this stage can help.
In a crib, your baby has the freedom to move, adjust their position, and self-soothe, making it easier for them to connect sleep cycles and resettle during wake-ups. A larger sleep space sets the stage for more independent and restorative sleep during this regression.
Pro Tip: When a Crib Doesn’t Fit in Your Room
If you prefer to keep your baby in your room but don’t have space for a crib, a safe pack-and-play with a breathable mattress is an excellent alternative. It provides the room your baby needs for movement while keeping them close to you.
Tips for a Smooth Transition from Bassinet to Crib
1. Start with naps: Allow your baby to get used to the crib during daytime naps before transitioning fully to nighttime sleep.
2. Maintain consistency: Use familiar sleep tools, like a sound machine or sleep sack, to create a comfortable and familiar sleep environment in the crib.
3. Take it slow: If your baby resists the change, be patient. Transitioning to a new sleep space can take time, so stay consistent and reassuring.
Frequently Asked Questions About Moving from Bassinet to Crib
1. Can my baby sleep in a crib from birth?
Yes, cribs are safe for newborns as long as they meet the American Academy of Pediatrics’ (AAP) guidelines for safe sleep. Ensure the mattress is firm, fits snugly, and is free of loose bedding or toys.
2. What’s the difference between a crib and a pack-and-play?
A crib is larger, sturdier, and designed for long-term use, while a pack-and-play is portable and often used for travel or smaller spaces. Both are safe options, but pack-and-plays may feel less spacious for growing babies.
3. How can I tell if my baby is ready for a crib?
Look for signs like restlessness, outgrowing the bassinet, or starting to roll. These are all indicators that your baby is ready for more room to move.
4. Does moving to a crib prevent flathead syndrome?
Yes! A crib gives your baby the freedom to turn their head and reposition naturally during sleep, reducing pressure on one area of their skull.
5. Is it safe to use a pack-and-play for sleep?
Yes, as long as it meets safety standards. Make sure to use a firm, breathable mattress, and follow the manufacturer’s guidelines.
Final Thoughts
Transitioning your baby from a bassinet to a crib before three months can have a big impact on their development and sleep quality. A crib provides the space they need to roll, move, and self-soothe while helping to prevent conditions like flathead syndrome and torticollis. It also sets your baby up for success during milestones like the four-month sleep regression.
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