Crochet

Hey, so I'm not familiar with the specific pattern but it sounds like probably a baby blanket?

In that case it's going to depend on what sort of wool, for example if it's labeled "superwash" then that generally holds up well to being washed although it can sometimes grow quite a bit so it'd be worth washing a swatch to test it. Personally for a baby if you're going with wool I'd lean towards only using merino as it's very soft and good for sensitive skin (source: myself, I can't wear any other kind of wool 😢)

Any other wool I'd be concerned not only about how it'll hold up to washing but also just the risk of skin irritations. There's also the risk that baby may be allergic to wool in general.