The United States does not yet have a comprehensive legal regime to manage germline editing. However, the US Congress, which appropriates funds annually to support the Food and Drug Administration (FDA), has enacted a rider that prevents the agency from using those funds to receive applications for clinical trials. In this manner, Congress has imposed a de facto moratorium that prevents scientists from creating children with modified genomes. In most of the fifty states, scientists remain free to edit human gametes and embryos in the lab as long as they mind federal regulations governing research.In the future, Congress and state legislatures may ban germline editing, in whole or in part. Such bans may face legal challenges. To be sure, the United States has not ratified the International Covenant on Economic, Social and Cultural Rights, and is not bound by its requirement that parties respect scientific freedom. Nor does the US Constitution expressly state a right to engage in scientific research. However, some academics argue that such a right can be derived from the First Amendment. Further, those who cannot conceive a healthy child without germline editing may claim that a ban violates their constitutional right to privacy.