I wouldn't stress about it too much until she is here and you can see what her hair is actually like. My baby is 5 months old and her hair is just starting to curl a bit, so we really haven't done anything to it except wash it.
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I’ve always used castor oil or olive oil on my little girls hair and she’s now 4 months x
First time mom. I have a friend who has mixed girls, she told me that baby lotion would work fine to moisturize my babies hair.