Many moms will start putting together their baby registry checklist at around 12 weeks, but starting your own registry earlier or later than this is perfectly fine. It's common for expectant moms to start looking into products and baby gear quite early on, even before they start making an actual list. There are even registry websites that let you create a private list that you can share at a later date. Starting early isn't absolutely necessary, but it can be useful, as it helps you stay ahead and get your baby registry checklist finished a good amount of time before your baby shower, if you're having one. It also gives you time to add to your list if you think of anything else you need.