Wouldn't it be chaotic to buy only after confinement month?
Especially things like baby cot, you'll need time to choose, transport and install. Last week, hubby spent 2hr installing our baby cot.
Also the baby bath tub, the first day you got home you would need it.
Buying at last minute, you wouldn't have much choice eg; buying at non-promotional price, when out of stocks for the color/model etc.

If you're latching, you can buy baby bottle later. Baby toys too.