If I become a U.S. citizen while my family petition is pending, does that change my relative’s immigration category?

Yes, naturalization can significantly impact a pending family-based petition. For example, if you originally filed for your unmarried child over 21 as a lawful permanent resident under F2B, becoming a U.S. citizen may convert the case to the F1 category. In some cases, this may shorten or lengthen the waiting time depending on Visa Bulletin movement.