One thing all parents will attest to is the obsession with sleep - or the lack of it!
If you have a baby or toddler who won't sleep or who keeps waking during the night, you quickly become obsessed with how to fix it because of the physical toll exhaustion takes on your body.
You might be consumed with apps, blogs, books, other parents' opinions, sleep experts - even old wives' tales that you're desperately clinging onto for a good night's sleep.
This is the worst thing to do if your baby isn't sleeping
But we're here to tell you that one common 'sleep aid' is actually causing more harm than good.
We're talking about night lights!
Any artificial light messes with nature
Ms Gouin explained that if a baby or child sleeps with a night light, it's likely their body is being told to wake, rather than to go to sleep.
"Even when their eyes are closed, the light still comes through, which can mean confusing and mixed messages throughout the entire stretch of night sleep," she added.
"Having a night light or any artificial light on in the sleep space completely messes with nature.
"Our bodies are so cleverly designed to sleep and wake naturally on their own, influenced by dark, night, sleep and day, light, wake - we really shouldn't mess with that and why would we want to?"