My wife and I are expecting our first baby very soon. However, I am a heavy sleeper and I am worried that I will not wake up to cries from the baby. Do people generally become lighter sleepers with the knowledge that they have a little one to care for during the night? I am really hoping that I will be able to beat my wife to the crib sometimes so that she doesn't feel guilty when she prods me awake.

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    Sudden memories of a two-year old actually physically prying my eyelids open at 3:30 a.m. and asking "you awake daddy?" Yep. Am now! lol Commented Nov 18, 2015 at 20:47
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    anecdotal: I am semi light sleeper, and became ultra light sleeping when the babies were small. I always woke when they cried. My husband is a 'normal' sleeper, and the babies cries would not always wake him. However, if I was not home, he woke up, since he was more 'aware' of the fact that he needed to wake up. I expect it is the same thing where if you have a very early flight, some people wake up before they normally do, without the alarm clock.
    – Ida
    Commented Nov 18, 2015 at 22:18
  • Trust me, you'll wake up when your wife smacks you in the face and shouts "IT'S YOUR TURN!"
    – deworde
    Commented Nov 24, 2015 at 10:22
  • You'll become a no-sleeper. Everyone's different so you'll know soon enough
    – Kai Qing
    Commented Nov 25, 2015 at 21:22
  • Whether you become a lighter sleeper in general, you will find that you are attuned to your baby unlike anything else. When ours was born he would occasionally go "WAHHH!" in his sleep. This woke my wife up but not me. Mothers are literally hard-wired to respond to their babies. Commented Nov 24, 2019 at 10:30

6 Answers 6


It's not possible to say whether you will be a lighter sleeper after your child is born; that's entirely up to your brain chemistry and lots of other variables.

I also don't think that there is one 'generally' here. I became a harder sleeper, my wife became a lighter sleeper, for example. Anecdotally, most of the new mothers I've known became lighter sleepers, and among fathers it's more mixed; perhaps due to the differences in biology, perhaps just small sample size, I'm not sure. Looking around, I don't see any studies (though I don't have access to PubMed, maybe @Anongoodnurse or someone else can find some there), but I see lots of anecdotal evidence like this page supporting my experience - moms become lighter sleepers, dads not as often.

That doesn't mean you can't be helpful, though, even if you do have a harder time waking up when the baby wakes up. You can do more of the bedtime routine, for example, allowing your wife some time to relax (or to go to bed earlier). You can wake up earlier so you're the one waking up with the baby in the morning (that's me, for example). There're plenty of ways to deal with your overall problem if you don't turn into a lighter sleeper.

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    The studies I've read conclude that moms become lighter sleepers, fathers don't change. But, at the same time, all sleepers seem to respond to their particular name. Commented Nov 18, 2015 at 20:08
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    Maybe more fathers should be named "WAAAAAAH".
    – Acire
    Commented Nov 18, 2015 at 20:20
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    @Erica: I think the problem is that many fathers are (or rather want to be) tied to their role as the family's bread-earner and do not partake in caring for babies at night. If taking care of crying children at night is their job as well, most of them will learn to wake up. I sleep with my window open and do not wake up when the truck delivers the next door lunch place at 5am, but I do wake when a child's feeble voice calls me from the next room.
    – sbi
    Commented Nov 19, 2015 at 11:07
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    @sbi I think that's a very outdated view.
    – Joe
    Commented Nov 19, 2015 at 15:03
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    @sbi I'm often told "how lucky" I am that my spouse is really involved, helps with chores, helps with the kids, and so on. The comment typically comes from other working mothers whose spouses apparently don't help (for whatever reason). Depends on where you are whether Mostly Mom is outdated, or a shared parenting approach is radically progressive...
    – Acire
    Commented Nov 20, 2015 at 16:56

I also don't know what studies on the subject, if any, have found. But surely there is variation between people, so you'll see for yourself what ends up happening to you.

I am a very heavy sleeper, and my wife isn't. After our first birth, and again after our second, my sleep gradually became lighter as a result of getting used to waking up (with the help of my wife, who was still a lighter sleeper than I).

One way to help this process is to have the baby sleep with you in your bed or in an extension of your bed - on your side. Be sure, though, that your sleep is not so heavy that you might roll over the baby without waking up!

Another possibility is to have you sleep for set periods of time (say, every other day) in the same room with the baby, while your wife sleeps in a different room, and make it clear that it is only your responsibility to take care of the baby and feed her - your wife sleeps straight tonight, and she's not going to come to your aid. With responsibility comes lighter sleep.

Lastly, when the baby reaches the stage of crying her throat out because of gas, both you and your wife are going to be awake together anyway.

Have a great birthing and parenting experience!


I have a reputation among those who have lived in a house with me over the years for being able to sleep anywhere, anytime and through anything. That hasn't changed, but my son crying wakes me up.

You might be the same, you might be different, it really is an experience that nothing and no one can fully prepare you for, but one thing I can say is this. The fact that you're thinking about this sort of thing tells me you're going to do just fine as a husband and father.

Good luck, and enjoy your little bundle.


My boyfriend was a very heavy sleeper and I moved a lot in my sleep. When our daughter was born I admit we slept with her (reason being I was breast feeding, not a good excuse I am aware of now) and for me as soon as either one of them moved I was awake and he become a lighter sleeper as well. Even now (she is 3 now) when she's in her own bed/own room I can hear her instantly.

Interesting example is when you three are in the store and your on the other end, your going to hear her cry and you will know its yours and no one else's. Its cute really.

  • You don't need "excuses" for your style of parenting, co-sleeping or whatever. You did what worked for you and millions of parents all over the world.
    – Stephie
    Commented Nov 24, 2015 at 9:41
  • Don't feel bad about cosleeping! You do the best you can at the time. I've been there too. It's survival mode the first few months and you do what you can to get through it. Don't feel guilty.
    – stan
    Commented Nov 25, 2019 at 12:15

We have three kids. When I wake up in the morning, I ask my wife if I missed anything between the time I fell asleep and the time my four alarm clocks go off to wake me up. Sometimes, I wake up to find a child who made his way into our bed sometime during the night. No, my sleep did not get any lighter with kids.

However, I have an easier time staying up late (and a harder time falling asleep), so whenever our kids woke up / wake up "earlier" in the night (say, before 1:30 a.m.), I take care of it and my wife can go to bed / stay in bed. (The flip-side of what Joe said.) If you are giving bottles, you can be even more useful at these times.

Bottom line, if you don't become a lighter sleeper, you'll find some other way to pick up some slack.


I was an incredibly heavy sleeper, the heaviest of anyone I've ever known. Since I became a dad, I wake to every little grunt, every little squeak my daughter makes over the baby monitor. I wake multiple times a night searching through the covers trying to find my baby in the bed--even though we've never once let her sleep in our bed (he sleeps in another room). I've been driving my wife crazy. She's not sleeping well because I wake up so often. You never know how you'll adapt.

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