For a premature baby, does sleep or feeding matter more?

The simple answer

For a premature baby, what's more important — food or sleep?

Early on it's food, and it isn't close. A preemie who sleeps through feeds can quietly fall behind, because she hasn't got reserves and she doesn't reliably wake when hungry the way a term baby does.

That's why units set feeding schedules, and why those schedules involve waking a peacefully sleeping baby, which feels wrong every single time.

Why she sleeps more and feeds worse

Both come from the same place. She's using energy on things a term baby has already sorted out — temperature, breathing, digestion — and there's less left over.

So she slept more and got tired half way through a feed. Sometimes she managed only a small part of it by mouth. The problem was not appetite. It was stamina.

That combination is why the schedule matters. Left to her own rhythm she'd have slept and under-fed, and both would have looked peaceful.

Corrected age, for everything you read

Sleep charts, wake windows, nap guidance — all of it assumes a term baby, and all of it should be read against her due date rather than her birthday.

Ours was born at 33 weeks with a due date seven weeks later, which meant that at ten weeks old she was around three weeks corrected. Every sleep article we read described a different baby until we made that adjustment.

It does flip. Once she's gaining steadily, feeding effectively, and past the point her baby's doctor or NICU nurse is watching for, the waking stops and sleep becomes the priority it is for any baby.

Ask when. Specifically: at what point can we stop waking her, and what would tell you she's ready?

We asked, the clear answer was she was gaining weight consistently and had passed the 3.5kg mark (this was the figure our doctor gave for Ari specifically, it is not this number for everyone). Once we could stop waking her up it felt like a massive achievement and a gift, we could let our little one sleep.