Newborn Sleep: Common Mistakes New Parents Make

We hate to break it to you, but your dozy, peaceful infant who simply falls asleep, milk-drunk, after feeding may not always be this way. The first few weeks (or even months) are not always indicative of the kind of sleeper you happened to score in the newborn sleep lottery. Some babies randomly sleep through the night early on (congratulations!) but it doesn’t mean this will continue indefinitely.

Have you weathered the four-month sleep regression yet? Yeah, you might want to read up on that. (Sorry.) And even though nursing to sleep or rocking to sleep before naps and bedtime might be working for you now, know that sometimes IT JUST STOPS WORKING.

We get it, falling asleep on the sofa with an infant curled up on your chest is one of the best feelings in the world. Many an exhausted new mom has nodded off for a bit while her sleeping baby is sprawled across her lap or nestled up all warm and cozy on a breastfeeding pillow.

But according to the American Academy of Pediatrics (AAP), this kind of co-sleeping—on a couch or armchair—is a serious newborn sleep mistake. It's way more dangerous than co-sleeping in a bed, due to the risk of dropping or smothering the baby. If you’re going to nap or sleep with your infant—doctors say not to, but they know many parents do it—opt for bed-sharing (and do it as safely as possible, with no blankets or pillows in the bed).

This is a contentious one, because we’ve all been there: Your baby conks out in the car seat while you’re driving home or running errands, and the beauty of the bucket seat is that you can pop it out and transfer your sleeping infant inside for the remainder of her nap. But according to the AAP, allowing an infant to sleep in a bucket car seat that’s been placed on the floor or clicked into a stroller is a safety hazard, as the baby’s head can fall forward and cause something called positional asphyxiation.

Due to the angle of the seat design, it’s much safer to let your newborn nap in the car seat while it’s attached to the base and installed in the car. Letting your baby sleep in a car seat overnight when you’re not awake enough to check on her is a serious baby sleep mistake. In fact, experts actually recommend limiting the time your baby spends in a car seat, bouncer or swing to 30 minutes, mostly for developmental reasons (it restricts motion) and the risk of developing positional plagiocephaly (aka flattened head syndrome). However, we’d like to acknowledge that this 30-minute maximum is downright impossible on road trips, for parents who have long work or daycare commutes, or when the swing is truly the only place you can get your infant to nap.  We’d love to see more research on this recommendation.

This one’s pretty easy to follow: Don’t use crib bumpers. They've actually been banned in the US, after years of doctors lobbying against them. Yes, some babies flail around a lot in their sleep, especially when they’re on the verge of learning to roll, crawl or walk. But they're unlikely to seriously injure themselves by bumping their heads on a crib rail. While those "breathable" mesh bumpers do a good job of keeping soothers (and little hands and feet) from poking out of the crib slats, they are also not recommended due to the risk of entanglement and strangulation. Also, word to the wise: older, more mobile babies can stand on bumpers and use them as a step when they’re trying to monkey their way off the crib.

And while we're at it, you shouldn't use a DockATot or "infant lounger" for unsupervised sleep inside (or outside) the crib, either. They're technically no longer available in Canada, but similar products are still on the market.

If you intend to sleep train, it’s important to know that it may never feel like the right time. Experts say it’s easiest to sleep train a baby between the ages of six and 12 months, but use your judgment and listen to your gut. If you’re not fully committed to sleep training before you start, you won’t stick to it. You can even add a baby sound machine to the mix.

This is a tricky one. Experts have gone back and forth about how long a baby should share a bedroom with their parents. Most recently, in the summer of 2022, the AAP recommended room-sharing for at least six months, but ideally a full year.

But let’s be real: Many parents' bedrooms only fit a bassinet (not a full crib), and most babies outgrow the bassinet (or start rolling or pulling up on the sides) by month four, five or six. Some babies will wake up in the night more frequently if they hear or smell their parents nearby and will sleep more soundly in their own room. It’s also pretty hard to teach independent sleep or do the cry-it-out method of sleep training if your baby is right next to you.

And let's not discount mom and dad's sleep. Many parents say they don't sleep as well when their baby is in their room, because they wake up with every little grunt, snore or fart the baby makes.

If room-sharing is working for you, great—but don't feel pressured into it beyond six months.

Baby monitors are super useful, but they're no substitute for avoiding baby sleep mistakes. If you hear your baby stirring, a quick peek at a video monitor can tell you if it’s a full-fledged wakeup, or just some nothing-to-see-here squirming. Sometimes you can get back to your Netflix without opening the nursery door, or quickly pop a paci back in before the situation escalates. But some parents are taking the high-tech baby monitor trend to the extreme, buying wearable vital-sign devices that measure an infant’s heart rate and oxygen saturation levels.

The AAP advises against using these kinds of cardiorespiratory monitors, as well as the sensors that go under the baby’s mattress, because they can cause false alarms, which make parents anxious and lead to unnecessary ER visits and tests. They can also make parents less focused on safe sleep practices because they believe the device will alert them to any and all problems.

Always put your baby into the crib on their back (not their side or her tummy); keep blankets and pillows out of the crib; and stop using swaddles once your baby has learned how to roll.

If you're one of the lucky parents with a "unicorn baby" (this means your baby is sleeping well without much effort on your part), try not to gloat. It doesn’t necessarily mean that you’re doing it right, while that other mom with the colicky, sleepless baby hasn’t figured it out. Believe us, she's trying.

Newsflash: Your baby is always teething. Or sick with a cold. Or coming down with something. Or recovering from something. Or over-tired. Or suffering from Unexplained Fussy Baby Syndrome. OK, we made that one up. But it’s kinda true.

Getting a newborn to sleep can feel like a Sisyphean challenge. Know that one day your precious baby will go back to bed, and you will get a good night's sleep. One day.

This article was originally published in January 2017 and has since been updated.