• Adela

Why does my baby wake up at 3:00A.M.?

Updated: Jan 7

That right there might be the single most common question new parents ask.


Is it a developmental milestone? A regression? Are they getting too much sleep during the day, or not enough? Maybe they’re just hungry. Maybe they’re too hot, or too cold.

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Reasons for 3:00 AM Wake-Ups

Is it a developmental milestone? A regression? Are they getting too much sleep during the day, or not enough? Maybe they’re just hungry. Maybe they’re too hot, or too cold. Well, the truth is that it could be any of those things, and it could be a combination of several of them.


What that means, and what you’re probably already aware of, is that baby’s sleep is tremendously complicated. Their bodies and brains are rapidly going through significant changes, and by the time they’ve got one issue under control, a new one pops up to take its place. The reason most people have such a challenging time with their babies’ sleep is because of problems that aren’t so simple, and don’t have obvious solutions. Imagine this scenario: An 18 month old child gets plenty of fresh air and sunlight during the day, goes down easily for long, restful naps, but when bedtime rolls around, suddenly they’re full of energy and want to play. When they’re told it’s time for bed, they get upset and bedtime becomes a battle. Once they do finally get to sleep, they wake up several times at night and never sleep past 5:30 in the morning.


So what’s going on? Is baby getting too much sleep during the day? What this baby’s demonstrating in this scenario is actually a need for more sleep, not less.


How Your Baby's Hormones Affects Sleep

About three hours prior to when we’re naturally prone to waking up, our bodies start secreting a hormone called cortisol, and if you’ve done some reading on your baby’s sleep prior to this, the sight of that word probably causes you to flinch a little. Cortisol is a stimulating hormone, and is also produced in times of stress in order to elevate the heart rate and stimulate the nervous system (in case, y’know, bears) but in the morning, it’s just trying to get us started. Think of it as mother nature’s caffeine. And if cortisol is our morning cup of coffee, melatonin is our evening glass of wine. Once the sun starts to go down, our bodies recognize the onset of night and begin to produce this lovely sleep- inducing hormone, which helps us get to sleep and stay asleep until morning, when the whole process starts over again. Melatonin production is increased and starts earlier in the evening when we awaken to some nice, bright sunlight.


But as beautifully crafted as this system is, it’s not perfect and it’s easily confused. So in the situation we examined above, here’s what’s happening...

Sleep Consultant Vancouver
Sleep Consultant Vancouver

Baby’s taking great naps during the day, which is obviously wonderful, and she’s getting lots of time outdoors, so her body’s ready to crank out some melatonin when nighttime rolls around. So what’s with that burst of energy right before bedtime? So when baby’s body has begun producing melatonin, there’s a narrow window of time when the body expects baby to be going to sleep. After all, she’s a baby. What’s she got to stay awake for? She doesn’t watch The Bachelor and she hasn’t discovered the Internet yet. The brain instinctively decides that something isn’t right; that forwhatever reason, baby can’t sleep, (probably because, y’know, bears.) And if baby’s got a bear to run from, adding a shot of cortisol should help increase her chances for survival. So that’s exactly what it does.

Baby’s system starts secreting cortisol and, before you know it, she’s a little bit cranked. This often shows up in the form of playfulness and an abundance of energy. In short, baby missed the window and now she’s going to have a hard time getting to sleep, but her behavior indicates anything but sleepiness.

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Transform Your Baby's Sleep with Certified Pediatric Sleep Consultant Adela

How to Resolve baby waking up at 3:00A.M.?


While there’s no quick fix for adjusting baby’s hormone production schedule, you can definitely help her out by:

  1. Get baby outdoors during the day as much as possible. As I mentioned before, natural light during the day is the big cheerleader for melatonin production at night.

  2. Ensure that baby’s room is as dark as you can get it at night, and start turning down the lights in the house at least an hour before you put her to bed. Simulating the sunset will help to cue that melatonin production so that it’s in full swing when she goes into her crib.

  3. Avoid any TV, iPhone, tablet, or screen time of any kind for that same hour before bedtime. (Preferably even longer) as these devices emit a geyser of blue light, which will stimulate cortisol production right at the time when you’re trying to avoid it.

  4. Get baby on a predictable, consistent sleep schedule and teach her the skills she needs to fall asleep independently.

Because the truth is that you’re never going to prevent nighttime wake ups. We all wake up in the night, regardless of our age. As adults, we just have the ability to calmly assess the situation when we wake up in the dark, realize where we are, see that it’s still nighttime, and go right back to sleep. Most of the time we don’t even remember it the next morning.

So although we can’t prevent baby from waking up at night, we can safely and effectively help her learn to recognize that she’s safe, in familiar territory, still tired, and capable of getting back to sleep on her own. Check out my blog on sleep regressions and how your baby's sleep actually changes.


If you're seeking better sleep for your little one, snatch my FREE 5-step sleep solutions and reserve your FREE 15-minute sleep assessment today so we can chat through your specific situation.


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