What baby may need by age

Decide how far ahead to buy. Pick a window to see what the sources list by then, what can wait, and what another product may already cover. Ages come from the AAP, CDC, and the makers, and every one is linked.

When each thing comes into use

Each bar runs from when it's typically used to when most babies stop, where a source gives one. Open-ended bars keep going past the first year.

Product type
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Swaddles & sleepwear
From from birth to about 2 months
Bassinets
From from birth to about 5 months
Formula & baby nutrition
From from birth to about 12 months
Bottles & feeding gear
From from birth to about 18 months
Strollers
From from birth
Car seats
From from birth
Carriers
From from birth
Cribs
From from birth
Crib mattresses
From from birth
Play yards
From from birth
Changing pads
From from birth
Diapers
From from birth
Baby wipes
From from birth
Diaper care
From from birth
Bath
From from birth
Skin & sun care
From from birth
Grooming & oral care
From from birth
Activity & play gear
From from birth
Baby toys
From from birth
Baby books & keepsakes
From from birth
Postpartum recovery
From from birth
High chairs
From around 6 months to about 36 months
Babyproofing
From around 6 months
Baby food & feeding
From around 6 months
Sippy & kids' cups
From around 6 months
Toddler gear
From around 12 months

usually needed by then can wait or is optional

Ages come from the linked agency and maker pages. Every baby is different. This is general planning information, not medical advice. Check the label and the maker's instructions, and ask your pediatrician about your child.