Most people, rebdoniel, used to order their furniture for the baby (crib, dresser, carriage, etc.) in advance of the birth, putting a down payment on it, then have it delivered right after the birth. If we didn’t do this in advance, we ran the risk of not being able to get these items when they were immediately needed. I am not sure what most people do nowadays, but I have seen MANY pregnant young women and their moms at Chinese auctions putting tickets down on these items.
You can look at this as ayin hara as you mentioned, OR you could look at this as having true emunah that Hashem is watching out for the baby.