Caring for premature and micro preemies is a constant weighing of options for neonatal doctors and nurses working in NICUs. Here is some science what professionals go through on a daily basis caring to critical preemie babies.
Carissa Knits: Preemie Hats for Charity - my favorite baby hat to knit. Good for newborns and the pattern is very easily adaptable. I cast on 80 stitches and used the Flakey Baby Sock pattern from Jujube and Lolo.