Birthright citizenship in the United States of America refers a person's acquisition of United States citizenship by virtue of the circumstances of his or her birth. It contrasts with citizenship acquired in other ways, for example by naturalization later in life. Birthright citizenship may be conferred either by jus soli and jus sanguinis. Under United States law, any person born within the United States (including the overseas territories of Puerto Rico, Guam, the U.S. Virgin Islands, and the Northern Mariana Islands) and subject to its jurisdiction is automatically granted U.S. citizenship, as are many (though not all) children born to American citizens overseas.