When you use propositional phrases or conjunctive phrases, do you use a pronoun that matches your subject prior to mentioning the actual subject?
I don't think you'll need her number, but Jennifer's number is x.
I don't think you'll need Jennifer's number, but her number is x.
Although she is late, I think Jennifer will be here any minute now.
Although Jennifer is late, I think she will be here any minute now.