Sleep

Co-sleeping to Crib Transition

The short answer

Transitioning from co-sleeping to a crib is a common journey that many families navigate. Whether you are moving your baby for safety, sleep quality, or personal reasons, a gradual approach tends to work best. Most babies adjust within 1-3 weeks with patience and consistency, though some take a bit longer.

By Age

What to expect by age

The AAP recommends room-sharing without bed-sharing for the first 6-12 months. If you have been co-sleeping and want to transition, place the crib or bassinet right next to your bed. Your baby can still hear and smell you, which provides comfort. Start with naps in the crib to build familiarity, then try nighttime.

This is often a good window for transition because babies are old enough to sleep in longer stretches but have not yet developed strong separation anxiety. Try putting your baby down in the crib drowsy but awake. You can sit beside the crib and offer a reassuring hand on their chest. The crib should feel safe and familiar - use the same sleep sack and white noise.

Separation anxiety can make this transition trickier at this age. A very gradual approach works well - start by sleeping on a mattress beside the crib, then slowly move the mattress toward the door over several nights. Your baby will adjust to the crib as they feel your presence nearby. A lovey or comfort object (appropriate after 12 months) can help.

Toddlers who have co-slept may protest loudly, but they are also more capable of understanding changes. Involve them in setting up their sleep space - let them pick a stuffed animal or blanket. Stay in the room initially and gradually withdraw your presence. Be consistent even on tough nights, as going back to co-sleeping intermittently can make the transition harder.

Older toddlers can understand explanations about sleeping in their own bed. Use positive language and celebrate their bravery. Consider a sticker chart for motivation. It is okay to offer a "pass" that lets them come to your room one time per night if needed - this gives them a sense of control while maintaining boundaries.

What Should You Do?

When to take action

Probably normal when...
  • Your baby protests for several nights when first placed in the crib
  • The transition takes 1-3 weeks with gradual improvement
  • Your baby needs more comfort and reassurance during the transition period
  • Some nights are better than others during the adjustment
  • Your baby or toddler wakes more frequently at first but gradually adjusts
Mention at your next visit when...
  • Your child has extreme, persistent distress about the crib that does not improve after 3-4 weeks of consistent effort
  • The transition is causing significant stress for the whole family and you need support developing a plan
Act now when...
  • If your baby is currently co-sleeping in an unsafe arrangement (soft bedding, couch, or with impaired adults) - transition to a safe sleep surface immediately
  • Your child shows signs of severe anxiety like vomiting, hyperventilating, or self-harm when placed in the crib

Sources

Baby Only Napping 30 Minutes

Short naps of 30-45 minutes are extremely common in babies under 6 months. Your baby is waking at the end of a single sleep cycle and has not yet learned to link cycles together during the day. This is developmentally normal and typically improves on its own between 5-7 months as the brain matures.

Baby Fighting Sleep

A baby who fights sleep is usually either overtired, undertired, or going through a developmental leap. It can feel exhausting, but it is very common and does not mean anything is wrong. Adjusting wake windows and creating a calming pre-sleep routine are the most effective strategies.

My Baby Grinds Teeth While Sleeping

Teeth grinding (bruxism) is surprisingly common in babies and toddlers, affecting up to 30% of children. It often begins when babies first get teeth and may continue through early childhood. While the sound can be unsettling, occasional grinding is usually harmless and most children outgrow it by age 6. It may be related to teething discomfort, jaw development, or simply exploring their new teeth.

My Baby Moans in Their Sleep

Moaning, groaning, and grunting during sleep are extremely common in babies and are almost always harmless. Babies spend a large proportion of their sleep in active (REM) sleep, during which they naturally vocalize, twitch, and make facial expressions. These sounds typically decrease as your baby's nervous system matures over the first few months.

My Baby Naps Too Much

How much daytime sleep is "too much" depends heavily on your baby's age. Newborns naturally nap frequently and for long stretches, while older babies and toddlers gradually consolidate daytime sleep into fewer, shorter naps. Excessive daytime napping becomes a concern mainly if it consistently interferes with nighttime sleep or if it signals an underlying issue like illness.

Baby Needs Rocking to Sleep

Rocking your baby to sleep is a perfectly natural and loving way to help them drift off. It is not a bad habit - it is responsive parenting. If rocking is working for your family, there is no need to change anything. If you would like your baby to learn to fall asleep with less help, gentle, gradual approaches work best.