California Code, Penal Code - PEN § 1108

Upon a trial for procuring or attempting to procure an abortion, or aiding or assisting therein, or for inveigling, enticing, or taking away an unmarried female of previous chaste character, under the age of eighteen years, for the purpose of prostitution, or aiding or assisting therein, the defendant cannot be convicted upon the testimony of the woman upon or with whom the offense was committed, unless she is corroborated by other evidence.