Facebook software engineer Brielle Harrison demonstrates the website's expanded options for gender identification at her company's Menlo Park, Calif., headquarters. Harrison, who helped engineer the project, plans to switch her identifier to "Trans Woman." Noah Berger/AP hide caption

itoggle caption Noah Berger/AP

Germany will allow parents to choose a third indeterminate option for newborn babies, under a new law that takes effect Friday. Deshakalyan Chowdhury/AFP/Getty Images hide caption

itoggle caption Deshakalyan Chowdhury/AFP/Getty Images