B.R.
I know there are paints available that are safe for an infant crib. I would check that out carefully. However, personally, I would leave it the natural color. Who said natural wood isn't a good color for a girl? Do your 'girly' decorating in other ways in the room. The money you don't spend on paint for the crib could go a long way toward some really cute ideas in other areas of the room. And you won't have any worries about paint fumes during your pregnancy either!