Prenatal Nondiscrimination Act of 2018 or PRENDA This bill imposes criminal penalties on anyone who knowingly or knowingly attempts to: (1) perform an abortion knowing that the abortion is sought based on the sex or gender of the child, (2) use force or the threat of force to coerce a sex-selection abortion, (3) solicit or accept funds for the performance of such an abortion, or (4) transport a woman into the United States or across a state line for the purpose of obtaining such an abortion. The bill authorizes civil actions by: (1) fathers, or maternal grandparents if the mother is an unemancipated minor, of unborn children who are the subject of a prohibited sex-selection abortion; or (2) women upon whom an abortion has been performed or attempted with a knowing or attempted use of force or threat of force to coerce a sex-selection abortion. The bill also authorizes injunctive relief to prevent an abortion provider from performing or attempting further such abortions. Violations of this bill are deemed to be prohibited discrimination under title VI (Federally Assisted Programs) of the Civil Rights Act of 1964. Medical and mental health professionals must report known or suspected violations to law enforcement authorities. A woman having such an abortion may not be prosecuted or held civilly liable. Courts must make such orders as necessary to protect the anonymity of any woman upon whom an abortion has been performed or attempted if she does not give her written consent to such disclosure. In the absence of such consent, any party, other than a public official, who brings an action must use a pseudonym.