When fragmented sleep is unavoidable - as it is for most new parents for the first months of a child's life - the advice to simply sleep more is not only unhelpful, it misses the point. The question is not how to get eight hours. It is how to make every hour you do get count for as much as possible.
Why Quality Matters More When Quantity Is Limited
Sleep is not uniform. It cycles through stages - light sleep, deep slow-wave sleep, and REM - with each stage serving distinct functions. Deep sleep is when physical restoration happens. REM is when emotional processing and memory consolidation occur. When sleep is repeatedly interrupted, the body tends to be robbed of these deeper stages first, since they typically arrive later in each cycle.
This is why new parents often describe a specific kind of exhaustion - not just tiredness, but cognitive fog, emotional fragility, and physical depletion that feels disproportionate to the hours they managed to sleep.
What You Can Control
You cannot control when the baby wakes. You can control the quality of the sleep you get between those wakings. The factors that most affect how restorative each stretch of sleep is: the completeness of darkness when you sleep, how quickly you transition into deep sleep, and whether your breathing remains efficient throughout.
A complete blackout removes any ambient light that would delay sleep onset. Mouth tape and nasal tape ensure that when you do fall asleep, your breathing is efficient enough to support the deeper stages rather than keeping you at the surface.
The Practical Approach
Treat the windows of sleep you do have as protected. When the opportunity to sleep arrives, make the environment as conducive as possible to falling asleep quickly and sleeping deeply. The goal is not to recapture what you had before - it is to extract as much restoration as possible from what you have now.